2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/config.h>
39 #include <linux/module.h>
40 #include <linux/errno.h>
41 #include <linux/signal.h>
42 #include <linux/sched.h>
43 #include <linux/timer.h>
44 #include <linux/time.h>
45 #include <linux/interrupt.h>
46 #include <linux/pci.h>
47 #include <linux/tty.h>
48 #include <linux/tty_flip.h>
49 #include <linux/serial.h>
50 #include <linux/major.h>
51 #include <linux/string.h>
52 #include <linux/fcntl.h>
53 #include <linux/ptrace.h>
54 #include <linux/ioport.h>
56 #include <linux/slab.h>
57 #include <linux/netdevice.h>
58 #include <linux/vmalloc.h>
59 #include <linux/init.h>
60 #include <linux/delay.h>
61 #include <linux/ioctl.h>
63 #include <asm/system.h>
67 #include <linux/bitops.h>
68 #include <asm/types.h>
69 #include <linux/termios.h>
70 #include <linux/workqueue.h>
71 #include <linux/hdlc.h>
73 #include <pcmcia/cs_types.h>
74 #include <pcmcia/cs.h>
75 #include <pcmcia/cistpl.h>
76 #include <pcmcia/cisreg.h>
77 #include <pcmcia/ds.h>
79 #ifdef CONFIG_HDLC_MODULE
83 #define GET_USER(error,value,addr) error = get_user(value,addr)
84 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
85 #define PUT_USER(error,value,addr) error = put_user(value,addr)
86 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
88 #include <asm/uaccess.h>
90 #include "linux/synclink.h"
92 static MGSL_PARAMS default_params = {
93 MGSL_MODE_HDLC, /* unsigned long mode */
94 0, /* unsigned char loopback; */
95 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
96 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
97 0, /* unsigned long clock_speed; */
98 0xff, /* unsigned char addr_filter; */
99 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
100 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
101 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
102 9600, /* unsigned long data_rate; */
103 8, /* unsigned char data_bits; */
104 1, /* unsigned char stop_bits; */
105 ASYNC_PARITY_NONE /* unsigned char parity; */
111 unsigned char status;
115 /* The queue of BH actions to be performed */
118 #define BH_TRANSMIT 2
121 #define IO_PIN_SHUTDOWN_LIMIT 100
123 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
125 struct _input_signal_events {
138 * Device instance data structure
141 typedef struct _mgslpc_info {
142 void *if_ptr; /* General purpose pointer (used by SPPP) */
145 int count; /* count of opens */
147 unsigned short close_delay;
148 unsigned short closing_wait; /* time to wait before closing */
150 struct mgsl_icount icount;
152 struct tty_struct *tty;
154 int x_char; /* xon/xoff character */
155 int blocked_open; /* # of blocked opens */
156 unsigned char read_status_mask;
157 unsigned char ignore_status_mask;
159 unsigned char *tx_buf;
164 /* circular list of fixed length rx buffers */
166 unsigned char *rx_buf; /* memory allocated for all rx buffers */
167 int rx_buf_total_size; /* size of memory allocated for rx buffers */
168 int rx_put; /* index of next empty rx buffer */
169 int rx_get; /* index of next full rx buffer */
170 int rx_buf_size; /* size in bytes of single rx buffer */
171 int rx_buf_count; /* total number of rx buffers */
172 int rx_frame_count; /* number of full rx buffers */
174 wait_queue_head_t open_wait;
175 wait_queue_head_t close_wait;
177 wait_queue_head_t status_event_wait_q;
178 wait_queue_head_t event_wait_q;
179 struct timer_list tx_timer; /* HDLC transmit timeout timer */
180 struct _mgslpc_info *next_device; /* device list link */
182 unsigned short imra_value;
183 unsigned short imrb_value;
184 unsigned char pim_value;
187 struct work_struct task; /* task structure for scheduling bh */
196 int dcd_chkcount; /* check counts to prevent */
197 int cts_chkcount; /* too many IRQs if a signal */
198 int dsr_chkcount; /* is floating */
209 int if_mode; /* serial interface selection (RS-232, v.35 etc) */
211 char device_name[25]; /* device instance name */
213 unsigned int io_base; /* base I/O address of adapter */
214 unsigned int irq_level;
216 MGSL_PARAMS params; /* communications parameters */
218 unsigned char serial_signals; /* current serial signal states */
220 char irq_occurred; /* for diagnostics use */
222 unsigned int init_error; /* startup error (DIAGS) */
224 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
225 BOOLEAN drop_rts_on_tx_done;
227 struct _input_signal_events input_signal_events;
230 struct pcmcia_device *p_dev;
234 /* SPPP/Cisco HDLC device parts */
240 struct net_device *netdev;
245 #define MGSLPC_MAGIC 0x5402
248 * The size of the serial xmit buffer is 1 page, or 4096 bytes
250 #define TXBUFSIZE 4096
253 #define CHA 0x00 /* channel A offset */
254 #define CHB 0x40 /* channel B offset */
257 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
304 #define IRQ_BREAK_ON BIT15 // rx break detected
305 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
306 #define IRQ_ALLSENT BIT13 // all sent
307 #define IRQ_UNDERRUN BIT12 // transmit data underrun
308 #define IRQ_TIMER BIT11 // timer interrupt
309 #define IRQ_CTS BIT10 // CTS status change
310 #define IRQ_TXREPEAT BIT9 // tx message repeat
311 #define IRQ_TXFIFO BIT8 // transmit pool ready
312 #define IRQ_RXEOM BIT7 // receive message end
313 #define IRQ_EXITHUNT BIT6 // receive frame start
314 #define IRQ_RXTIME BIT6 // rx char timeout
315 #define IRQ_DCD BIT2 // carrier detect status change
316 #define IRQ_OVERRUN BIT1 // receive frame overflow
317 #define IRQ_RXFIFO BIT0 // receive pool full
321 #define XFW BIT6 // transmit FIFO write enable
322 #define CEC BIT2 // command executing
323 #define CTS BIT1 // CTS state
328 #define PVR_AUTOCTS BIT3
329 #define PVR_RS232 0x20 /* 0010b */
330 #define PVR_V35 0xe0 /* 1110b */
331 #define PVR_RS422 0x40 /* 0100b */
333 /* Register access functions */
335 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
336 #define read_reg(info, reg) inb((info)->io_base + (reg))
338 #define read_reg16(info, reg) inw((info)->io_base + (reg))
339 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
341 #define set_reg_bits(info, reg, mask) \
342 write_reg(info, (reg), \
343 (unsigned char) (read_reg(info, (reg)) | (mask)))
344 #define clear_reg_bits(info, reg, mask) \
345 write_reg(info, (reg), \
346 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
348 * interrupt enable/disable routines
350 static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
352 if (channel == CHA) {
353 info->imra_value |= mask;
354 write_reg16(info, CHA + IMR, info->imra_value);
356 info->imrb_value |= mask;
357 write_reg16(info, CHB + IMR, info->imrb_value);
360 static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
362 if (channel == CHA) {
363 info->imra_value &= ~mask;
364 write_reg16(info, CHA + IMR, info->imra_value);
366 info->imrb_value &= ~mask;
367 write_reg16(info, CHB + IMR, info->imrb_value);
371 #define port_irq_disable(info, mask) \
372 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
374 #define port_irq_enable(info, mask) \
375 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
377 static void rx_start(MGSLPC_INFO *info);
378 static void rx_stop(MGSLPC_INFO *info);
380 static void tx_start(MGSLPC_INFO *info);
381 static void tx_stop(MGSLPC_INFO *info);
382 static void tx_set_idle(MGSLPC_INFO *info);
384 static void get_signals(MGSLPC_INFO *info);
385 static void set_signals(MGSLPC_INFO *info);
387 static void reset_device(MGSLPC_INFO *info);
389 static void hdlc_mode(MGSLPC_INFO *info);
390 static void async_mode(MGSLPC_INFO *info);
392 static void tx_timeout(unsigned long context);
394 static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
397 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
398 static void hdlcdev_tx_done(MGSLPC_INFO *info);
399 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size);
400 static int hdlcdev_init(MGSLPC_INFO *info);
401 static void hdlcdev_exit(MGSLPC_INFO *info);
404 static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
406 static BOOLEAN register_test(MGSLPC_INFO *info);
407 static BOOLEAN irq_test(MGSLPC_INFO *info);
408 static int adapter_test(MGSLPC_INFO *info);
410 static int claim_resources(MGSLPC_INFO *info);
411 static void release_resources(MGSLPC_INFO *info);
412 static void mgslpc_add_device(MGSLPC_INFO *info);
413 static void mgslpc_remove_device(MGSLPC_INFO *info);
415 static int rx_get_frame(MGSLPC_INFO *info);
416 static void rx_reset_buffers(MGSLPC_INFO *info);
417 static int rx_alloc_buffers(MGSLPC_INFO *info);
418 static void rx_free_buffers(MGSLPC_INFO *info);
420 static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs);
423 * Bottom half interrupt handlers
425 static void bh_handler(void* Context);
426 static void bh_transmit(MGSLPC_INFO *info);
427 static void bh_status(MGSLPC_INFO *info);
432 static int tiocmget(struct tty_struct *tty, struct file *file);
433 static int tiocmset(struct tty_struct *tty, struct file *file,
434 unsigned int set, unsigned int clear);
435 static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
436 static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
437 static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params);
438 static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
439 static int set_txidle(MGSLPC_INFO *info, int idle_mode);
440 static int set_txenable(MGSLPC_INFO *info, int enable);
441 static int tx_abort(MGSLPC_INFO *info);
442 static int set_rxenable(MGSLPC_INFO *info, int enable);
443 static int wait_events(MGSLPC_INFO *info, int __user *mask);
445 static MGSLPC_INFO *mgslpc_device_list = NULL;
446 static int mgslpc_device_count = 0;
449 * Set this param to non-zero to load eax with the
450 * .text section address and breakpoint on module load.
451 * This is useful for use with gdb and add-symbol-file command.
453 static int break_on_load=0;
456 * Driver major number, defaults to zero to get auto
457 * assigned major number. May be forced as module parameter.
459 static int ttymajor=0;
461 static int debug_level = 0;
462 static int maxframe[MAX_DEVICE_COUNT] = {0,};
463 static int dosyncppp[MAX_DEVICE_COUNT] = {1,1,1,1};
465 module_param(break_on_load, bool, 0);
466 module_param(ttymajor, int, 0);
467 module_param(debug_level, int, 0);
468 module_param_array(maxframe, int, NULL, 0);
469 module_param_array(dosyncppp, int, NULL, 0);
471 MODULE_LICENSE("GPL");
473 static char *driver_name = "SyncLink PC Card driver";
474 static char *driver_version = "$Revision: 4.34 $";
476 static struct tty_driver *serial_driver;
478 /* number of characters left in xmit buffer before we ask for more */
479 #define WAKEUP_CHARS 256
481 static void mgslpc_change_params(MGSLPC_INFO *info);
482 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
484 /* PCMCIA prototypes */
486 static int mgslpc_config(struct pcmcia_device *link);
487 static void mgslpc_release(u_long arg);
488 static void mgslpc_detach(struct pcmcia_device *p_dev);
491 * 1st function defined in .text section. Calling this function in
492 * init_module() followed by a breakpoint allows a remote debugger
493 * (gdb) to get the .text address for the add-symbol-file command.
494 * This allows remote debugging of dynamically loadable modules.
496 static void* mgslpc_get_text_ptr(void)
498 return mgslpc_get_text_ptr;
502 * line discipline callback wrappers
504 * The wrappers maintain line discipline references
505 * while calling into the line discipline.
507 * ldisc_flush_buffer - flush line discipline receive buffers
508 * ldisc_receive_buf - pass receive data to line discipline
511 static void ldisc_flush_buffer(struct tty_struct *tty)
513 struct tty_ldisc *ld = tty_ldisc_ref(tty);
515 if (ld->flush_buffer)
516 ld->flush_buffer(tty);
521 static void ldisc_receive_buf(struct tty_struct *tty,
522 const __u8 *data, char *flags, int count)
524 struct tty_ldisc *ld;
527 ld = tty_ldisc_ref(tty);
530 ld->receive_buf(tty, data, flags, count);
535 static int mgslpc_probe(struct pcmcia_device *link)
540 if (debug_level >= DEBUG_LEVEL_INFO)
541 printk("mgslpc_attach\n");
543 info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
545 printk("Error can't allocate device instance data\n");
549 memset(info, 0, sizeof(MGSLPC_INFO));
550 info->magic = MGSLPC_MAGIC;
551 INIT_WORK(&info->task, bh_handler, info);
552 info->max_frame_size = 4096;
553 info->close_delay = 5*HZ/10;
554 info->closing_wait = 30*HZ;
555 init_waitqueue_head(&info->open_wait);
556 init_waitqueue_head(&info->close_wait);
557 init_waitqueue_head(&info->status_event_wait_q);
558 init_waitqueue_head(&info->event_wait_q);
559 spin_lock_init(&info->lock);
560 spin_lock_init(&info->netlock);
561 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
562 info->idle_mode = HDLC_TXIDLE_FLAGS;
563 info->imra_value = 0xffff;
564 info->imrb_value = 0xffff;
565 info->pim_value = 0xff;
570 /* Initialize the struct pcmcia_device structure */
572 /* Interrupt setup */
573 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
574 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
575 link->irq.Handler = NULL;
577 link->conf.Attributes = 0;
578 link->conf.IntType = INT_MEMORY_AND_IO;
580 ret = mgslpc_config(link);
584 mgslpc_add_device(info);
589 /* Card has been inserted.
592 #define CS_CHECK(fn, ret) \
593 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
595 static int mgslpc_config(struct pcmcia_device *link)
597 MGSLPC_INFO *info = link->priv;
600 int last_fn, last_ret;
602 cistpl_cftable_entry_t dflt = { 0 };
603 cistpl_cftable_entry_t *cfg;
605 if (debug_level >= DEBUG_LEVEL_INFO)
606 printk("mgslpc_config(0x%p)\n", link);
608 /* read CONFIG tuple to find its configuration registers */
609 tuple.DesiredTuple = CISTPL_CONFIG;
610 tuple.Attributes = 0;
611 tuple.TupleData = buf;
612 tuple.TupleDataMax = sizeof(buf);
613 tuple.TupleOffset = 0;
614 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
615 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
616 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
617 link->conf.ConfigBase = parse.config.base;
618 link->conf.Present = parse.config.rmask[0];
620 /* get CIS configuration entry */
622 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
623 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
625 cfg = &(parse.cftable_entry);
626 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
627 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
629 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
633 link->conf.ConfigIndex = cfg->index;
634 link->conf.Attributes |= CONF_ENABLE_IRQ;
636 /* IO window settings */
637 link->io.NumPorts1 = 0;
638 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
639 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
640 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
641 if (!(io->flags & CISTPL_IO_8BIT))
642 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
643 if (!(io->flags & CISTPL_IO_16BIT))
644 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
645 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
646 link->io.BasePort1 = io->win[0].base;
647 link->io.NumPorts1 = io->win[0].len;
648 CS_CHECK(RequestIO, pcmcia_request_io(link, &link->io));
651 link->conf.Attributes = CONF_ENABLE_IRQ;
652 link->conf.IntType = INT_MEMORY_AND_IO;
653 link->conf.ConfigIndex = 8;
654 link->conf.Present = PRESENT_OPTION;
656 link->irq.Attributes |= IRQ_HANDLE_PRESENT;
657 link->irq.Handler = mgslpc_isr;
658 link->irq.Instance = info;
659 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
661 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
663 info->io_base = link->io.BasePort1;
664 info->irq_level = link->irq.AssignedIRQ;
666 /* add to linked list of devices */
667 sprintf(info->node.dev_name, "mgslpc0");
668 info->node.major = info->node.minor = 0;
669 link->dev_node = &info->node;
671 printk(KERN_INFO "%s: index 0x%02x:",
672 info->node.dev_name, link->conf.ConfigIndex);
673 if (link->conf.Attributes & CONF_ENABLE_IRQ)
674 printk(", irq %d", link->irq.AssignedIRQ);
675 if (link->io.NumPorts1)
676 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
677 link->io.BasePort1+link->io.NumPorts1-1);
682 cs_error(link, last_fn, last_ret);
683 mgslpc_release((u_long)link);
687 /* Card has been removed.
688 * Unregister device and release PCMCIA configuration.
689 * If device is open, postpone until it is closed.
691 static void mgslpc_release(u_long arg)
693 struct pcmcia_device *link = (struct pcmcia_device *)arg;
695 if (debug_level >= DEBUG_LEVEL_INFO)
696 printk("mgslpc_release(0x%p)\n", link);
698 pcmcia_disable_device(link);
701 static void mgslpc_detach(struct pcmcia_device *link)
703 if (debug_level >= DEBUG_LEVEL_INFO)
704 printk("mgslpc_detach(0x%p)\n", link);
706 ((MGSLPC_INFO *)link->priv)->stop = 1;
707 mgslpc_release((u_long)link);
709 mgslpc_remove_device((MGSLPC_INFO *)link->priv);
712 static int mgslpc_suspend(struct pcmcia_device *link)
714 MGSLPC_INFO *info = link->priv;
721 static int mgslpc_resume(struct pcmcia_device *link)
723 MGSLPC_INFO *info = link->priv;
731 static inline int mgslpc_paranoia_check(MGSLPC_INFO *info,
732 char *name, const char *routine)
734 #ifdef MGSLPC_PARANOIA_CHECK
735 static const char *badmagic =
736 "Warning: bad magic number for mgsl struct (%s) in %s\n";
737 static const char *badinfo =
738 "Warning: null mgslpc_info for (%s) in %s\n";
741 printk(badinfo, name, routine);
744 if (info->magic != MGSLPC_MAGIC) {
745 printk(badmagic, name, routine);
756 #define CMD_RXFIFO BIT7 // release current rx FIFO
757 #define CMD_RXRESET BIT6 // receiver reset
758 #define CMD_RXFIFO_READ BIT5
759 #define CMD_START_TIMER BIT4
760 #define CMD_TXFIFO BIT3 // release current tx FIFO
761 #define CMD_TXEOM BIT1 // transmit end message
762 #define CMD_TXRESET BIT0 // transmit reset
764 static BOOLEAN wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
767 /* wait for command completion */
768 while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) {
776 static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
778 wait_command_complete(info, channel);
779 write_reg(info, (unsigned char) (channel + CMDR), cmd);
782 static void tx_pause(struct tty_struct *tty)
784 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
787 if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
789 if (debug_level >= DEBUG_LEVEL_INFO)
790 printk("tx_pause(%s)\n",info->device_name);
792 spin_lock_irqsave(&info->lock,flags);
793 if (info->tx_enabled)
795 spin_unlock_irqrestore(&info->lock,flags);
798 static void tx_release(struct tty_struct *tty)
800 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
803 if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
805 if (debug_level >= DEBUG_LEVEL_INFO)
806 printk("tx_release(%s)\n",info->device_name);
808 spin_lock_irqsave(&info->lock,flags);
809 if (!info->tx_enabled)
811 spin_unlock_irqrestore(&info->lock,flags);
814 /* Return next bottom half action to perform.
815 * or 0 if nothing to do.
817 static int bh_action(MGSLPC_INFO *info)
822 spin_lock_irqsave(&info->lock,flags);
824 if (info->pending_bh & BH_RECEIVE) {
825 info->pending_bh &= ~BH_RECEIVE;
827 } else if (info->pending_bh & BH_TRANSMIT) {
828 info->pending_bh &= ~BH_TRANSMIT;
830 } else if (info->pending_bh & BH_STATUS) {
831 info->pending_bh &= ~BH_STATUS;
836 /* Mark BH routine as complete */
837 info->bh_running = 0;
838 info->bh_requested = 0;
841 spin_unlock_irqrestore(&info->lock,flags);
846 static void bh_handler(void* Context)
848 MGSLPC_INFO *info = (MGSLPC_INFO*)Context;
854 if (debug_level >= DEBUG_LEVEL_BH)
855 printk( "%s(%d):bh_handler(%s) entry\n",
856 __FILE__,__LINE__,info->device_name);
858 info->bh_running = 1;
860 while((action = bh_action(info)) != 0) {
862 /* Process work item */
863 if ( debug_level >= DEBUG_LEVEL_BH )
864 printk( "%s(%d):bh_handler() work item action=%d\n",
865 __FILE__,__LINE__,action);
870 while(rx_get_frame(info));
879 /* unknown work item ID */
880 printk("Unknown work item ID=%08X!\n", action);
885 if (debug_level >= DEBUG_LEVEL_BH)
886 printk( "%s(%d):bh_handler(%s) exit\n",
887 __FILE__,__LINE__,info->device_name);
890 static void bh_transmit(MGSLPC_INFO *info)
892 struct tty_struct *tty = info->tty;
893 if (debug_level >= DEBUG_LEVEL_BH)
894 printk("bh_transmit() entry on %s\n", info->device_name);
898 wake_up_interruptible(&tty->write_wait);
902 static void bh_status(MGSLPC_INFO *info)
904 info->ri_chkcount = 0;
905 info->dsr_chkcount = 0;
906 info->dcd_chkcount = 0;
907 info->cts_chkcount = 0;
910 /* eom: non-zero = end of frame */
911 static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
913 unsigned char data[2];
914 unsigned char fifo_count, read_count, i;
915 RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
917 if (debug_level >= DEBUG_LEVEL_ISR)
918 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom);
920 if (!info->rx_enabled)
923 if (info->rx_frame_count >= info->rx_buf_count) {
924 /* no more free buffers */
925 issue_command(info, CHA, CMD_RXRESET);
926 info->pending_bh |= BH_RECEIVE;
927 info->rx_overflow = 1;
928 info->icount.buf_overrun++;
933 /* end of frame, get FIFO count from RBCL register */
934 if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f)))
940 if (fifo_count == 1) {
942 data[0] = read_reg(info, CHA + RXFIFO);
945 *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
947 fifo_count -= read_count;
948 if (!fifo_count && eom)
949 buf->status = data[--read_count];
951 for (i = 0; i < read_count; i++) {
952 if (buf->count >= info->max_frame_size) {
953 /* frame too large, reset receiver and reset current buffer */
954 issue_command(info, CHA, CMD_RXRESET);
958 *(buf->data + buf->count) = data[i];
961 } while (fifo_count);
964 info->pending_bh |= BH_RECEIVE;
965 info->rx_frame_count++;
967 if (info->rx_put >= info->rx_buf_count)
970 issue_command(info, CHA, CMD_RXFIFO);
973 static void rx_ready_async(MGSLPC_INFO *info, int tcd)
975 unsigned char data, status, flag;
978 struct tty_struct *tty = info->tty;
979 struct mgsl_icount *icount = &info->icount;
982 /* early termination, get FIFO count from RBCL register */
983 fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
985 /* Zero fifo count could mean 0 or 32 bytes available.
986 * If BIT5 of STAR is set then at least 1 byte is available.
988 if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
993 tty_buffer_request_room(tty, fifo_count);
994 /* Flush received async data to receive data buffer. */
996 data = read_reg(info, CHA + RXFIFO);
997 status = read_reg(info, CHA + RXFIFO);
1003 // if no frameing/crc error then save data
1004 // BIT7:parity error
1005 // BIT6:framing error
1007 if (status & (BIT7 + BIT6)) {
1013 /* discard char if tty control flags say so */
1014 if (status & info->ignore_status_mask)
1017 status &= info->read_status_mask;
1021 else if (status & BIT6)
1024 work += tty_insert_flip_char(tty, data, flag);
1026 issue_command(info, CHA, CMD_RXFIFO);
1028 if (debug_level >= DEBUG_LEVEL_ISR) {
1029 printk("%s(%d):rx_ready_async",
1031 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1032 __FILE__,__LINE__,icount->rx,icount->brk,
1033 icount->parity,icount->frame,icount->overrun);
1037 tty_flip_buffer_push(tty);
1041 static void tx_done(MGSLPC_INFO *info)
1043 if (!info->tx_active)
1046 info->tx_active = 0;
1047 info->tx_aborting = 0;
1049 if (info->params.mode == MGSL_MODE_ASYNC)
1052 info->tx_count = info->tx_put = info->tx_get = 0;
1053 del_timer(&info->tx_timer);
1055 if (info->drop_rts_on_tx_done) {
1057 if (info->serial_signals & SerialSignal_RTS) {
1058 info->serial_signals &= ~SerialSignal_RTS;
1061 info->drop_rts_on_tx_done = 0;
1066 hdlcdev_tx_done(info);
1070 if (info->tty->stopped || info->tty->hw_stopped) {
1074 info->pending_bh |= BH_TRANSMIT;
1078 static void tx_ready(MGSLPC_INFO *info)
1080 unsigned char fifo_count = 32;
1083 if (debug_level >= DEBUG_LEVEL_ISR)
1084 printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name);
1086 if (info->params.mode == MGSL_MODE_HDLC) {
1087 if (!info->tx_active)
1090 if (info->tty->stopped || info->tty->hw_stopped) {
1094 if (!info->tx_count)
1095 info->tx_active = 0;
1098 if (!info->tx_count)
1101 while (info->tx_count && fifo_count) {
1102 c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get)));
1105 write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
1107 write_reg16(info, CHA + TXFIFO,
1108 *((unsigned short*)(info->tx_buf + info->tx_get)));
1110 info->tx_count -= c;
1111 info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
1115 if (info->params.mode == MGSL_MODE_ASYNC) {
1116 if (info->tx_count < WAKEUP_CHARS)
1117 info->pending_bh |= BH_TRANSMIT;
1118 issue_command(info, CHA, CMD_TXFIFO);
1121 issue_command(info, CHA, CMD_TXFIFO);
1123 issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
1127 static void cts_change(MGSLPC_INFO *info)
1130 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1131 irq_disable(info, CHB, IRQ_CTS);
1133 if (info->serial_signals & SerialSignal_CTS)
1134 info->input_signal_events.cts_up++;
1136 info->input_signal_events.cts_down++;
1137 wake_up_interruptible(&info->status_event_wait_q);
1138 wake_up_interruptible(&info->event_wait_q);
1140 if (info->flags & ASYNC_CTS_FLOW) {
1141 if (info->tty->hw_stopped) {
1142 if (info->serial_signals & SerialSignal_CTS) {
1143 if (debug_level >= DEBUG_LEVEL_ISR)
1144 printk("CTS tx start...");
1146 info->tty->hw_stopped = 0;
1148 info->pending_bh |= BH_TRANSMIT;
1152 if (!(info->serial_signals & SerialSignal_CTS)) {
1153 if (debug_level >= DEBUG_LEVEL_ISR)
1154 printk("CTS tx stop...");
1156 info->tty->hw_stopped = 1;
1161 info->pending_bh |= BH_STATUS;
1164 static void dcd_change(MGSLPC_INFO *info)
1167 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1168 irq_disable(info, CHB, IRQ_DCD);
1170 if (info->serial_signals & SerialSignal_DCD) {
1171 info->input_signal_events.dcd_up++;
1174 info->input_signal_events.dcd_down++;
1176 if (info->netcount) {
1177 if (info->serial_signals & SerialSignal_DCD)
1178 netif_carrier_on(info->netdev);
1180 netif_carrier_off(info->netdev);
1183 wake_up_interruptible(&info->status_event_wait_q);
1184 wake_up_interruptible(&info->event_wait_q);
1186 if (info->flags & ASYNC_CHECK_CD) {
1187 if (debug_level >= DEBUG_LEVEL_ISR)
1188 printk("%s CD now %s...", info->device_name,
1189 (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
1190 if (info->serial_signals & SerialSignal_DCD)
1191 wake_up_interruptible(&info->open_wait);
1193 if (debug_level >= DEBUG_LEVEL_ISR)
1194 printk("doing serial hangup...");
1196 tty_hangup(info->tty);
1199 info->pending_bh |= BH_STATUS;
1202 static void dsr_change(MGSLPC_INFO *info)
1205 if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1206 port_irq_disable(info, PVR_DSR);
1208 if (info->serial_signals & SerialSignal_DSR)
1209 info->input_signal_events.dsr_up++;
1211 info->input_signal_events.dsr_down++;
1212 wake_up_interruptible(&info->status_event_wait_q);
1213 wake_up_interruptible(&info->event_wait_q);
1214 info->pending_bh |= BH_STATUS;
1217 static void ri_change(MGSLPC_INFO *info)
1220 if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1221 port_irq_disable(info, PVR_RI);
1223 if (info->serial_signals & SerialSignal_RI)
1224 info->input_signal_events.ri_up++;
1226 info->input_signal_events.ri_down++;
1227 wake_up_interruptible(&info->status_event_wait_q);
1228 wake_up_interruptible(&info->event_wait_q);
1229 info->pending_bh |= BH_STATUS;
1232 /* Interrupt service routine entry point.
1236 * irq interrupt number that caused interrupt
1237 * dev_id device ID supplied during interrupt registration
1238 * regs interrupted processor context
1240 static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs)
1242 MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id;
1244 unsigned char gis, pis;
1247 if (debug_level >= DEBUG_LEVEL_ISR)
1248 printk("mgslpc_isr(%d) entry.\n", irq);
1252 if (!(info->p_dev->_locked))
1255 spin_lock(&info->lock);
1257 while ((gis = read_reg(info, CHA + GIS))) {
1258 if (debug_level >= DEBUG_LEVEL_ISR)
1259 printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis);
1261 if ((gis & 0x70) || count > 1000) {
1262 printk("synclink_cs:hardware failed or ejected\n");
1267 if (gis & (BIT1 + BIT0)) {
1268 isr = read_reg16(info, CHB + ISR);
1274 if (gis & (BIT3 + BIT2))
1276 isr = read_reg16(info, CHA + ISR);
1277 if (isr & IRQ_TIMER) {
1278 info->irq_occurred = 1;
1279 irq_disable(info, CHA, IRQ_TIMER);
1283 if (isr & IRQ_EXITHUNT) {
1284 info->icount.exithunt++;
1285 wake_up_interruptible(&info->event_wait_q);
1287 if (isr & IRQ_BREAK_ON) {
1289 if (info->flags & ASYNC_SAK)
1292 if (isr & IRQ_RXTIME) {
1293 issue_command(info, CHA, CMD_RXFIFO_READ);
1295 if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) {
1296 if (info->params.mode == MGSL_MODE_HDLC)
1297 rx_ready_hdlc(info, isr & IRQ_RXEOM);
1299 rx_ready_async(info, isr & IRQ_RXEOM);
1303 if (isr & IRQ_UNDERRUN) {
1304 if (info->tx_aborting)
1305 info->icount.txabort++;
1307 info->icount.txunder++;
1310 else if (isr & IRQ_ALLSENT) {
1311 info->icount.txok++;
1314 else if (isr & IRQ_TXFIFO)
1318 pis = read_reg(info, CHA + PIS);
1326 /* Request bottom half processing if there's something
1327 * for it to do and the bh is not already running
1330 if (info->pending_bh && !info->bh_running && !info->bh_requested) {
1331 if ( debug_level >= DEBUG_LEVEL_ISR )
1332 printk("%s(%d):%s queueing bh task.\n",
1333 __FILE__,__LINE__,info->device_name);
1334 schedule_work(&info->task);
1335 info->bh_requested = 1;
1338 spin_unlock(&info->lock);
1340 if (debug_level >= DEBUG_LEVEL_ISR)
1341 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1342 __FILE__,__LINE__,irq);
1347 /* Initialize and start device.
1349 static int startup(MGSLPC_INFO * info)
1353 if (debug_level >= DEBUG_LEVEL_INFO)
1354 printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name);
1356 if (info->flags & ASYNC_INITIALIZED)
1359 if (!info->tx_buf) {
1360 /* allocate a page of memory for a transmit buffer */
1361 info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
1362 if (!info->tx_buf) {
1363 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
1364 __FILE__,__LINE__,info->device_name);
1369 info->pending_bh = 0;
1371 memset(&info->icount, 0, sizeof(info->icount));
1373 init_timer(&info->tx_timer);
1374 info->tx_timer.data = (unsigned long)info;
1375 info->tx_timer.function = tx_timeout;
1377 /* Allocate and claim adapter resources */
1378 retval = claim_resources(info);
1380 /* perform existance check and diagnostics */
1382 retval = adapter_test(info);
1385 if (capable(CAP_SYS_ADMIN) && info->tty)
1386 set_bit(TTY_IO_ERROR, &info->tty->flags);
1387 release_resources(info);
1391 /* program hardware for current parameters */
1392 mgslpc_change_params(info);
1395 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1397 info->flags |= ASYNC_INITIALIZED;
1402 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1404 static void shutdown(MGSLPC_INFO * info)
1406 unsigned long flags;
1408 if (!(info->flags & ASYNC_INITIALIZED))
1411 if (debug_level >= DEBUG_LEVEL_INFO)
1412 printk("%s(%d):mgslpc_shutdown(%s)\n",
1413 __FILE__,__LINE__, info->device_name );
1415 /* clear status wait queue because status changes */
1416 /* can't happen after shutting down the hardware */
1417 wake_up_interruptible(&info->status_event_wait_q);
1418 wake_up_interruptible(&info->event_wait_q);
1420 del_timer(&info->tx_timer);
1423 free_page((unsigned long) info->tx_buf);
1424 info->tx_buf = NULL;
1427 spin_lock_irqsave(&info->lock,flags);
1432 /* TODO:disable interrupts instead of reset to preserve signal states */
1435 if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
1436 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
1440 spin_unlock_irqrestore(&info->lock,flags);
1442 release_resources(info);
1445 set_bit(TTY_IO_ERROR, &info->tty->flags);
1447 info->flags &= ~ASYNC_INITIALIZED;
1450 static void mgslpc_program_hw(MGSLPC_INFO *info)
1452 unsigned long flags;
1454 spin_lock_irqsave(&info->lock,flags);
1458 info->tx_count = info->tx_put = info->tx_get = 0;
1460 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
1467 info->dcd_chkcount = 0;
1468 info->cts_chkcount = 0;
1469 info->ri_chkcount = 0;
1470 info->dsr_chkcount = 0;
1472 irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
1473 port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
1476 if (info->netcount || info->tty->termios->c_cflag & CREAD)
1479 spin_unlock_irqrestore(&info->lock,flags);
1482 /* Reconfigure adapter based on new parameters
1484 static void mgslpc_change_params(MGSLPC_INFO *info)
1489 if (!info->tty || !info->tty->termios)
1492 if (debug_level >= DEBUG_LEVEL_INFO)
1493 printk("%s(%d):mgslpc_change_params(%s)\n",
1494 __FILE__,__LINE__, info->device_name );
1496 cflag = info->tty->termios->c_cflag;
1498 /* if B0 rate (hangup) specified then negate DTR and RTS */
1499 /* otherwise assert DTR and RTS */
1501 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1503 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
1505 /* byte size and parity */
1507 switch (cflag & CSIZE) {
1508 case CS5: info->params.data_bits = 5; break;
1509 case CS6: info->params.data_bits = 6; break;
1510 case CS7: info->params.data_bits = 7; break;
1511 case CS8: info->params.data_bits = 8; break;
1512 default: info->params.data_bits = 7; break;
1516 info->params.stop_bits = 2;
1518 info->params.stop_bits = 1;
1520 info->params.parity = ASYNC_PARITY_NONE;
1521 if (cflag & PARENB) {
1523 info->params.parity = ASYNC_PARITY_ODD;
1525 info->params.parity = ASYNC_PARITY_EVEN;
1528 info->params.parity = ASYNC_PARITY_SPACE;
1532 /* calculate number of jiffies to transmit a full
1533 * FIFO (32 bytes) at specified data rate
1535 bits_per_char = info->params.data_bits +
1536 info->params.stop_bits + 1;
1538 /* if port data rate is set to 460800 or less then
1539 * allow tty settings to override, otherwise keep the
1540 * current data rate.
1542 if (info->params.data_rate <= 460800) {
1543 info->params.data_rate = tty_get_baud_rate(info->tty);
1546 if ( info->params.data_rate ) {
1547 info->timeout = (32*HZ*bits_per_char) /
1548 info->params.data_rate;
1550 info->timeout += HZ/50; /* Add .02 seconds of slop */
1552 if (cflag & CRTSCTS)
1553 info->flags |= ASYNC_CTS_FLOW;
1555 info->flags &= ~ASYNC_CTS_FLOW;
1558 info->flags &= ~ASYNC_CHECK_CD;
1560 info->flags |= ASYNC_CHECK_CD;
1562 /* process tty input control flags */
1564 info->read_status_mask = 0;
1565 if (I_INPCK(info->tty))
1566 info->read_status_mask |= BIT7 | BIT6;
1567 if (I_IGNPAR(info->tty))
1568 info->ignore_status_mask |= BIT7 | BIT6;
1570 mgslpc_program_hw(info);
1573 /* Add a character to the transmit buffer
1575 static void mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
1577 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1578 unsigned long flags;
1580 if (debug_level >= DEBUG_LEVEL_INFO) {
1581 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1582 __FILE__,__LINE__,ch,info->device_name);
1585 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
1591 spin_lock_irqsave(&info->lock,flags);
1593 if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
1594 if (info->tx_count < TXBUFSIZE - 1) {
1595 info->tx_buf[info->tx_put++] = ch;
1596 info->tx_put &= TXBUFSIZE-1;
1601 spin_unlock_irqrestore(&info->lock,flags);
1604 /* Enable transmitter so remaining characters in the
1605 * transmit buffer are sent.
1607 static void mgslpc_flush_chars(struct tty_struct *tty)
1609 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1610 unsigned long flags;
1612 if (debug_level >= DEBUG_LEVEL_INFO)
1613 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1614 __FILE__,__LINE__,info->device_name,info->tx_count);
1616 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
1619 if (info->tx_count <= 0 || tty->stopped ||
1620 tty->hw_stopped || !info->tx_buf)
1623 if (debug_level >= DEBUG_LEVEL_INFO)
1624 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1625 __FILE__,__LINE__,info->device_name);
1627 spin_lock_irqsave(&info->lock,flags);
1628 if (!info->tx_active)
1630 spin_unlock_irqrestore(&info->lock,flags);
1633 /* Send a block of data
1637 * tty pointer to tty information structure
1638 * buf pointer to buffer containing send data
1639 * count size of send data in bytes
1641 * Returns: number of characters written
1643 static int mgslpc_write(struct tty_struct * tty,
1644 const unsigned char *buf, int count)
1647 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1648 unsigned long flags;
1650 if (debug_level >= DEBUG_LEVEL_INFO)
1651 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1652 __FILE__,__LINE__,info->device_name,count);
1654 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
1658 if (info->params.mode == MGSL_MODE_HDLC) {
1659 if (count > TXBUFSIZE) {
1663 if (info->tx_active)
1665 else if (info->tx_count)
1671 min(TXBUFSIZE - info->tx_count - 1,
1672 TXBUFSIZE - info->tx_put));
1676 memcpy(info->tx_buf + info->tx_put, buf, c);
1678 spin_lock_irqsave(&info->lock,flags);
1679 info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
1680 info->tx_count += c;
1681 spin_unlock_irqrestore(&info->lock,flags);
1688 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1689 spin_lock_irqsave(&info->lock,flags);
1690 if (!info->tx_active)
1692 spin_unlock_irqrestore(&info->lock,flags);
1695 if (debug_level >= DEBUG_LEVEL_INFO)
1696 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1697 __FILE__,__LINE__,info->device_name,ret);
1701 /* Return the count of free bytes in transmit buffer
1703 static int mgslpc_write_room(struct tty_struct *tty)
1705 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1708 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room"))
1711 if (info->params.mode == MGSL_MODE_HDLC) {
1712 /* HDLC (frame oriented) mode */
1713 if (info->tx_active)
1716 return HDLC_MAX_FRAME_SIZE;
1718 ret = TXBUFSIZE - info->tx_count - 1;
1723 if (debug_level >= DEBUG_LEVEL_INFO)
1724 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1725 __FILE__,__LINE__, info->device_name, ret);
1729 /* Return the count of bytes in transmit buffer
1731 static int mgslpc_chars_in_buffer(struct tty_struct *tty)
1733 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1736 if (debug_level >= DEBUG_LEVEL_INFO)
1737 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1738 __FILE__,__LINE__, info->device_name );
1740 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
1743 if (info->params.mode == MGSL_MODE_HDLC)
1744 rc = info->tx_active ? info->max_frame_size : 0;
1746 rc = info->tx_count;
1748 if (debug_level >= DEBUG_LEVEL_INFO)
1749 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1750 __FILE__,__LINE__, info->device_name, rc);
1755 /* Discard all data in the send buffer
1757 static void mgslpc_flush_buffer(struct tty_struct *tty)
1759 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1760 unsigned long flags;
1762 if (debug_level >= DEBUG_LEVEL_INFO)
1763 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1764 __FILE__,__LINE__, info->device_name );
1766 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
1769 spin_lock_irqsave(&info->lock,flags);
1770 info->tx_count = info->tx_put = info->tx_get = 0;
1771 del_timer(&info->tx_timer);
1772 spin_unlock_irqrestore(&info->lock,flags);
1774 wake_up_interruptible(&tty->write_wait);
1778 /* Send a high-priority XON/XOFF character
1780 static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
1782 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1783 unsigned long flags;
1785 if (debug_level >= DEBUG_LEVEL_INFO)
1786 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1787 __FILE__,__LINE__, info->device_name, ch );
1789 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
1794 spin_lock_irqsave(&info->lock,flags);
1795 if (!info->tx_enabled)
1797 spin_unlock_irqrestore(&info->lock,flags);
1801 /* Signal remote device to throttle send data (our receive data)
1803 static void mgslpc_throttle(struct tty_struct * tty)
1805 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1806 unsigned long flags;
1808 if (debug_level >= DEBUG_LEVEL_INFO)
1809 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1810 __FILE__,__LINE__, info->device_name );
1812 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
1816 mgslpc_send_xchar(tty, STOP_CHAR(tty));
1818 if (tty->termios->c_cflag & CRTSCTS) {
1819 spin_lock_irqsave(&info->lock,flags);
1820 info->serial_signals &= ~SerialSignal_RTS;
1822 spin_unlock_irqrestore(&info->lock,flags);
1826 /* Signal remote device to stop throttling send data (our receive data)
1828 static void mgslpc_unthrottle(struct tty_struct * tty)
1830 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1831 unsigned long flags;
1833 if (debug_level >= DEBUG_LEVEL_INFO)
1834 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1835 __FILE__,__LINE__, info->device_name );
1837 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
1844 mgslpc_send_xchar(tty, START_CHAR(tty));
1847 if (tty->termios->c_cflag & CRTSCTS) {
1848 spin_lock_irqsave(&info->lock,flags);
1849 info->serial_signals |= SerialSignal_RTS;
1851 spin_unlock_irqrestore(&info->lock,flags);
1855 /* get the current serial statistics
1857 static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount)
1860 if (debug_level >= DEBUG_LEVEL_INFO)
1861 printk("get_params(%s)\n", info->device_name);
1863 memset(&info->icount, 0, sizeof(info->icount));
1865 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
1872 /* get the current serial parameters
1874 static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
1877 if (debug_level >= DEBUG_LEVEL_INFO)
1878 printk("get_params(%s)\n", info->device_name);
1879 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
1885 /* set the serial parameters
1889 * info pointer to device instance data
1890 * new_params user buffer containing new serial params
1892 * Returns: 0 if success, otherwise error code
1894 static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params)
1896 unsigned long flags;
1897 MGSL_PARAMS tmp_params;
1900 if (debug_level >= DEBUG_LEVEL_INFO)
1901 printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
1902 info->device_name );
1903 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
1905 if ( debug_level >= DEBUG_LEVEL_INFO )
1906 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1907 __FILE__,__LINE__,info->device_name);
1911 spin_lock_irqsave(&info->lock,flags);
1912 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
1913 spin_unlock_irqrestore(&info->lock,flags);
1915 mgslpc_change_params(info);
1920 static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
1923 if (debug_level >= DEBUG_LEVEL_INFO)
1924 printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode);
1925 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
1931 static int set_txidle(MGSLPC_INFO * info, int idle_mode)
1933 unsigned long flags;
1934 if (debug_level >= DEBUG_LEVEL_INFO)
1935 printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
1936 spin_lock_irqsave(&info->lock,flags);
1937 info->idle_mode = idle_mode;
1939 spin_unlock_irqrestore(&info->lock,flags);
1943 static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
1946 if (debug_level >= DEBUG_LEVEL_INFO)
1947 printk("get_interface(%s)=%d\n", info->device_name, info->if_mode);
1948 COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
1954 static int set_interface(MGSLPC_INFO * info, int if_mode)
1956 unsigned long flags;
1958 if (debug_level >= DEBUG_LEVEL_INFO)
1959 printk("set_interface(%s,%d)\n", info->device_name, if_mode);
1960 spin_lock_irqsave(&info->lock,flags);
1961 info->if_mode = if_mode;
1963 val = read_reg(info, PVR) & 0x0f;
1964 switch (info->if_mode)
1966 case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
1967 case MGSL_INTERFACE_V35: val |= PVR_V35; break;
1968 case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
1970 write_reg(info, PVR, val);
1972 spin_unlock_irqrestore(&info->lock,flags);
1976 static int set_txenable(MGSLPC_INFO * info, int enable)
1978 unsigned long flags;
1980 if (debug_level >= DEBUG_LEVEL_INFO)
1981 printk("set_txenable(%s,%d)\n", info->device_name, enable);
1983 spin_lock_irqsave(&info->lock,flags);
1985 if (!info->tx_enabled)
1988 if (info->tx_enabled)
1991 spin_unlock_irqrestore(&info->lock,flags);
1995 static int tx_abort(MGSLPC_INFO * info)
1997 unsigned long flags;
1999 if (debug_level >= DEBUG_LEVEL_INFO)
2000 printk("tx_abort(%s)\n", info->device_name);
2002 spin_lock_irqsave(&info->lock,flags);
2003 if (info->tx_active && info->tx_count &&
2004 info->params.mode == MGSL_MODE_HDLC) {
2005 /* clear data count so FIFO is not filled on next IRQ.
2006 * This results in underrun and abort transmission.
2008 info->tx_count = info->tx_put = info->tx_get = 0;
2009 info->tx_aborting = TRUE;
2011 spin_unlock_irqrestore(&info->lock,flags);
2015 static int set_rxenable(MGSLPC_INFO * info, int enable)
2017 unsigned long flags;
2019 if (debug_level >= DEBUG_LEVEL_INFO)
2020 printk("set_rxenable(%s,%d)\n", info->device_name, enable);
2022 spin_lock_irqsave(&info->lock,flags);
2024 if (!info->rx_enabled)
2027 if (info->rx_enabled)
2030 spin_unlock_irqrestore(&info->lock,flags);
2034 /* wait for specified event to occur
2036 * Arguments: info pointer to device instance data
2037 * mask pointer to bitmask of events to wait for
2038 * Return Value: 0 if successful and bit mask updated with
2039 * of events triggerred,
2040 * otherwise error code
2042 static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
2044 unsigned long flags;
2047 struct mgsl_icount cprev, cnow;
2050 struct _input_signal_events oldsigs, newsigs;
2051 DECLARE_WAITQUEUE(wait, current);
2053 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
2057 if (debug_level >= DEBUG_LEVEL_INFO)
2058 printk("wait_events(%s,%d)\n", info->device_name, mask);
2060 spin_lock_irqsave(&info->lock,flags);
2062 /* return immediately if state matches requested events */
2064 s = info->serial_signals;
2066 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
2067 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
2068 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
2069 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
2071 spin_unlock_irqrestore(&info->lock,flags);
2075 /* save current irq counts */
2076 cprev = info->icount;
2077 oldsigs = info->input_signal_events;
2079 if ((info->params.mode == MGSL_MODE_HDLC) &&
2080 (mask & MgslEvent_ExitHuntMode))
2081 irq_enable(info, CHA, IRQ_EXITHUNT);
2083 set_current_state(TASK_INTERRUPTIBLE);
2084 add_wait_queue(&info->event_wait_q, &wait);
2086 spin_unlock_irqrestore(&info->lock,flags);
2091 if (signal_pending(current)) {
2096 /* get current irq counts */
2097 spin_lock_irqsave(&info->lock,flags);
2098 cnow = info->icount;
2099 newsigs = info->input_signal_events;
2100 set_current_state(TASK_INTERRUPTIBLE);
2101 spin_unlock_irqrestore(&info->lock,flags);
2103 /* if no change, wait aborted for some reason */
2104 if (newsigs.dsr_up == oldsigs.dsr_up &&
2105 newsigs.dsr_down == oldsigs.dsr_down &&
2106 newsigs.dcd_up == oldsigs.dcd_up &&
2107 newsigs.dcd_down == oldsigs.dcd_down &&
2108 newsigs.cts_up == oldsigs.cts_up &&
2109 newsigs.cts_down == oldsigs.cts_down &&
2110 newsigs.ri_up == oldsigs.ri_up &&
2111 newsigs.ri_down == oldsigs.ri_down &&
2112 cnow.exithunt == cprev.exithunt &&
2113 cnow.rxidle == cprev.rxidle) {
2119 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
2120 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
2121 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
2122 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
2123 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
2124 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
2125 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
2126 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
2127 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
2128 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
2136 remove_wait_queue(&info->event_wait_q, &wait);
2137 set_current_state(TASK_RUNNING);
2139 if (mask & MgslEvent_ExitHuntMode) {
2140 spin_lock_irqsave(&info->lock,flags);
2141 if (!waitqueue_active(&info->event_wait_q))
2142 irq_disable(info, CHA, IRQ_EXITHUNT);
2143 spin_unlock_irqrestore(&info->lock,flags);
2147 PUT_USER(rc, events, mask_ptr);
2151 static int modem_input_wait(MGSLPC_INFO *info,int arg)
2153 unsigned long flags;
2155 struct mgsl_icount cprev, cnow;
2156 DECLARE_WAITQUEUE(wait, current);
2158 /* save current irq counts */
2159 spin_lock_irqsave(&info->lock,flags);
2160 cprev = info->icount;
2161 add_wait_queue(&info->status_event_wait_q, &wait);
2162 set_current_state(TASK_INTERRUPTIBLE);
2163 spin_unlock_irqrestore(&info->lock,flags);
2167 if (signal_pending(current)) {
2172 /* get new irq counts */
2173 spin_lock_irqsave(&info->lock,flags);
2174 cnow = info->icount;
2175 set_current_state(TASK_INTERRUPTIBLE);
2176 spin_unlock_irqrestore(&info->lock,flags);
2178 /* if no change, wait aborted for some reason */
2179 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2180 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2185 /* check for change in caller specified modem input */
2186 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
2187 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
2188 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
2189 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
2196 remove_wait_queue(&info->status_event_wait_q, &wait);
2197 set_current_state(TASK_RUNNING);
2201 /* return the state of the serial control and status signals
2203 static int tiocmget(struct tty_struct *tty, struct file *file)
2205 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2206 unsigned int result;
2207 unsigned long flags;
2209 spin_lock_irqsave(&info->lock,flags);
2211 spin_unlock_irqrestore(&info->lock,flags);
2213 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
2214 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
2215 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
2216 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
2217 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
2218 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
2220 if (debug_level >= DEBUG_LEVEL_INFO)
2221 printk("%s(%d):%s tiocmget() value=%08X\n",
2222 __FILE__,__LINE__, info->device_name, result );
2226 /* set modem control signals (DTR/RTS)
2228 static int tiocmset(struct tty_struct *tty, struct file *file,
2229 unsigned int set, unsigned int clear)
2231 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2232 unsigned long flags;
2234 if (debug_level >= DEBUG_LEVEL_INFO)
2235 printk("%s(%d):%s tiocmset(%x,%x)\n",
2236 __FILE__,__LINE__,info->device_name, set, clear);
2238 if (set & TIOCM_RTS)
2239 info->serial_signals |= SerialSignal_RTS;
2240 if (set & TIOCM_DTR)
2241 info->serial_signals |= SerialSignal_DTR;
2242 if (clear & TIOCM_RTS)
2243 info->serial_signals &= ~SerialSignal_RTS;
2244 if (clear & TIOCM_DTR)
2245 info->serial_signals &= ~SerialSignal_DTR;
2247 spin_lock_irqsave(&info->lock,flags);
2249 spin_unlock_irqrestore(&info->lock,flags);
2254 /* Set or clear transmit break condition
2256 * Arguments: tty pointer to tty instance data
2257 * break_state -1=set break condition, 0=clear
2259 static void mgslpc_break(struct tty_struct *tty, int break_state)
2261 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2262 unsigned long flags;
2264 if (debug_level >= DEBUG_LEVEL_INFO)
2265 printk("%s(%d):mgslpc_break(%s,%d)\n",
2266 __FILE__,__LINE__, info->device_name, break_state);
2268 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
2271 spin_lock_irqsave(&info->lock,flags);
2272 if (break_state == -1)
2273 set_reg_bits(info, CHA+DAFO, BIT6);
2275 clear_reg_bits(info, CHA+DAFO, BIT6);
2276 spin_unlock_irqrestore(&info->lock,flags);
2279 /* Service an IOCTL request
2283 * tty pointer to tty instance data
2284 * file pointer to associated file object for device
2285 * cmd IOCTL command code
2286 * arg command argument/context
2288 * Return Value: 0 if success, otherwise error code
2290 static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
2291 unsigned int cmd, unsigned long arg)
2293 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2295 if (debug_level >= DEBUG_LEVEL_INFO)
2296 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
2297 info->device_name, cmd );
2299 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
2302 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2303 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
2304 if (tty->flags & (1 << TTY_IO_ERROR))
2308 return ioctl_common(info, cmd, arg);
2311 static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
2314 struct mgsl_icount cnow; /* kernel counter temps */
2315 struct serial_icounter_struct __user *p_cuser; /* user space */
2316 void __user *argp = (void __user *)arg;
2317 unsigned long flags;
2320 case MGSL_IOCGPARAMS:
2321 return get_params(info, argp);
2322 case MGSL_IOCSPARAMS:
2323 return set_params(info, argp);
2324 case MGSL_IOCGTXIDLE:
2325 return get_txidle(info, argp);
2326 case MGSL_IOCSTXIDLE:
2327 return set_txidle(info, (int)arg);
2329 return get_interface(info, argp);
2331 return set_interface(info,(int)arg);
2332 case MGSL_IOCTXENABLE:
2333 return set_txenable(info,(int)arg);
2334 case MGSL_IOCRXENABLE:
2335 return set_rxenable(info,(int)arg);
2336 case MGSL_IOCTXABORT:
2337 return tx_abort(info);
2338 case MGSL_IOCGSTATS:
2339 return get_stats(info, argp);
2340 case MGSL_IOCWAITEVENT:
2341 return wait_events(info, argp);
2343 return modem_input_wait(info,(int)arg);
2345 spin_lock_irqsave(&info->lock,flags);
2346 cnow = info->icount;
2347 spin_unlock_irqrestore(&info->lock,flags);
2349 PUT_USER(error,cnow.cts, &p_cuser->cts);
2350 if (error) return error;
2351 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
2352 if (error) return error;
2353 PUT_USER(error,cnow.rng, &p_cuser->rng);
2354 if (error) return error;
2355 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
2356 if (error) return error;
2357 PUT_USER(error,cnow.rx, &p_cuser->rx);
2358 if (error) return error;
2359 PUT_USER(error,cnow.tx, &p_cuser->tx);
2360 if (error) return error;
2361 PUT_USER(error,cnow.frame, &p_cuser->frame);
2362 if (error) return error;
2363 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
2364 if (error) return error;
2365 PUT_USER(error,cnow.parity, &p_cuser->parity);
2366 if (error) return error;
2367 PUT_USER(error,cnow.brk, &p_cuser->brk);
2368 if (error) return error;
2369 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
2370 if (error) return error;
2373 return -ENOIOCTLCMD;
2378 /* Set new termios settings
2382 * tty pointer to tty structure
2383 * termios pointer to buffer to hold returned old termios
2385 static void mgslpc_set_termios(struct tty_struct *tty, struct termios *old_termios)
2387 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2388 unsigned long flags;
2390 if (debug_level >= DEBUG_LEVEL_INFO)
2391 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__,
2392 tty->driver->name );
2394 /* just return if nothing has changed */
2395 if ((tty->termios->c_cflag == old_termios->c_cflag)
2396 && (RELEVANT_IFLAG(tty->termios->c_iflag)
2397 == RELEVANT_IFLAG(old_termios->c_iflag)))
2400 mgslpc_change_params(info);
2402 /* Handle transition to B0 status */
2403 if (old_termios->c_cflag & CBAUD &&
2404 !(tty->termios->c_cflag & CBAUD)) {
2405 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2406 spin_lock_irqsave(&info->lock,flags);
2408 spin_unlock_irqrestore(&info->lock,flags);
2411 /* Handle transition away from B0 status */
2412 if (!(old_termios->c_cflag & CBAUD) &&
2413 tty->termios->c_cflag & CBAUD) {
2414 info->serial_signals |= SerialSignal_DTR;
2415 if (!(tty->termios->c_cflag & CRTSCTS) ||
2416 !test_bit(TTY_THROTTLED, &tty->flags)) {
2417 info->serial_signals |= SerialSignal_RTS;
2419 spin_lock_irqsave(&info->lock,flags);
2421 spin_unlock_irqrestore(&info->lock,flags);
2424 /* Handle turning off CRTSCTS */
2425 if (old_termios->c_cflag & CRTSCTS &&
2426 !(tty->termios->c_cflag & CRTSCTS)) {
2427 tty->hw_stopped = 0;
2432 static void mgslpc_close(struct tty_struct *tty, struct file * filp)
2434 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2436 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
2439 if (debug_level >= DEBUG_LEVEL_INFO)
2440 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2441 __FILE__,__LINE__, info->device_name, info->count);
2446 if (tty_hung_up_p(filp))
2449 if ((tty->count == 1) && (info->count != 1)) {
2451 * tty->count is 1 and the tty structure will be freed.
2452 * info->count should be one in this case.
2453 * if it's not, correct it so that the port is shutdown.
2455 printk("mgslpc_close: bad refcount; tty->count is 1, "
2456 "info->count is %d\n", info->count);
2462 /* if at least one open remaining, leave hardware active */
2466 info->flags |= ASYNC_CLOSING;
2468 /* set tty->closing to notify line discipline to
2469 * only process XON/XOFF characters. Only the N_TTY
2470 * discipline appears to use this (ppp does not).
2474 /* wait for transmit data to clear all layers */
2476 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
2477 if (debug_level >= DEBUG_LEVEL_INFO)
2478 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2479 __FILE__,__LINE__, info->device_name );
2480 tty_wait_until_sent(tty, info->closing_wait);
2483 if (info->flags & ASYNC_INITIALIZED)
2484 mgslpc_wait_until_sent(tty, info->timeout);
2486 if (tty->driver->flush_buffer)
2487 tty->driver->flush_buffer(tty);
2489 ldisc_flush_buffer(tty);
2496 if (info->blocked_open) {
2497 if (info->close_delay) {
2498 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2500 wake_up_interruptible(&info->open_wait);
2503 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2505 wake_up_interruptible(&info->close_wait);
2508 if (debug_level >= DEBUG_LEVEL_INFO)
2509 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__,
2510 tty->driver->name, info->count);
2513 /* Wait until the transmitter is empty.
2515 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
2517 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2518 unsigned long orig_jiffies, char_time;
2523 if (debug_level >= DEBUG_LEVEL_INFO)
2524 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2525 __FILE__,__LINE__, info->device_name );
2527 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
2530 if (!(info->flags & ASYNC_INITIALIZED))
2533 orig_jiffies = jiffies;
2535 /* Set check interval to 1/5 of estimated time to
2536 * send a character, and make it at least 1. The check
2537 * interval should also be less than the timeout.
2538 * Note: use tight timings here to satisfy the NIST-PCTS.
2541 if ( info->params.data_rate ) {
2542 char_time = info->timeout/(32 * 5);
2549 char_time = min_t(unsigned long, char_time, timeout);
2551 if (info->params.mode == MGSL_MODE_HDLC) {
2552 while (info->tx_active) {
2553 msleep_interruptible(jiffies_to_msecs(char_time));
2554 if (signal_pending(current))
2556 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2560 while ((info->tx_count || info->tx_active) &&
2562 msleep_interruptible(jiffies_to_msecs(char_time));
2563 if (signal_pending(current))
2565 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2571 if (debug_level >= DEBUG_LEVEL_INFO)
2572 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2573 __FILE__,__LINE__, info->device_name );
2576 /* Called by tty_hangup() when a hangup is signaled.
2577 * This is the same as closing all open files for the port.
2579 static void mgslpc_hangup(struct tty_struct *tty)
2581 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2583 if (debug_level >= DEBUG_LEVEL_INFO)
2584 printk("%s(%d):mgslpc_hangup(%s)\n",
2585 __FILE__,__LINE__, info->device_name );
2587 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
2590 mgslpc_flush_buffer(tty);
2594 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2597 wake_up_interruptible(&info->open_wait);
2600 /* Block the current process until the specified port
2601 * is ready to be opened.
2603 static int block_til_ready(struct tty_struct *tty, struct file *filp,
2606 DECLARE_WAITQUEUE(wait, current);
2608 int do_clocal = 0, extra_count = 0;
2609 unsigned long flags;
2611 if (debug_level >= DEBUG_LEVEL_INFO)
2612 printk("%s(%d):block_til_ready on %s\n",
2613 __FILE__,__LINE__, tty->driver->name );
2615 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
2616 /* nonblock mode is set or port is not enabled */
2617 /* just verify that callout device is not active */
2618 info->flags |= ASYNC_NORMAL_ACTIVE;
2622 if (tty->termios->c_cflag & CLOCAL)
2625 /* Wait for carrier detect and the line to become
2626 * free (i.e., not in use by the callout). While we are in
2627 * this loop, info->count is dropped by one, so that
2628 * mgslpc_close() knows when to free things. We restore it upon
2629 * exit, either normal or abnormal.
2633 add_wait_queue(&info->open_wait, &wait);
2635 if (debug_level >= DEBUG_LEVEL_INFO)
2636 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2637 __FILE__,__LINE__, tty->driver->name, info->count );
2639 spin_lock_irqsave(&info->lock, flags);
2640 if (!tty_hung_up_p(filp)) {
2644 spin_unlock_irqrestore(&info->lock, flags);
2645 info->blocked_open++;
2648 if ((tty->termios->c_cflag & CBAUD)) {
2649 spin_lock_irqsave(&info->lock,flags);
2650 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2652 spin_unlock_irqrestore(&info->lock,flags);
2655 set_current_state(TASK_INTERRUPTIBLE);
2657 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
2658 retval = (info->flags & ASYNC_HUP_NOTIFY) ?
2659 -EAGAIN : -ERESTARTSYS;
2663 spin_lock_irqsave(&info->lock,flags);
2665 spin_unlock_irqrestore(&info->lock,flags);
2667 if (!(info->flags & ASYNC_CLOSING) &&
2668 (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
2672 if (signal_pending(current)) {
2673 retval = -ERESTARTSYS;
2677 if (debug_level >= DEBUG_LEVEL_INFO)
2678 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2679 __FILE__,__LINE__, tty->driver->name, info->count );
2684 set_current_state(TASK_RUNNING);
2685 remove_wait_queue(&info->open_wait, &wait);
2689 info->blocked_open--;
2691 if (debug_level >= DEBUG_LEVEL_INFO)
2692 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2693 __FILE__,__LINE__, tty->driver->name, info->count );
2696 info->flags |= ASYNC_NORMAL_ACTIVE;
2701 static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2705 unsigned long flags;
2707 /* verify range of specified line number */
2709 if ((line < 0) || (line >= mgslpc_device_count)) {
2710 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2711 __FILE__,__LINE__,line);
2715 /* find the info structure for the specified line */
2716 info = mgslpc_device_list;
2717 while(info && info->line != line)
2718 info = info->next_device;
2719 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
2722 tty->driver_data = info;
2725 if (debug_level >= DEBUG_LEVEL_INFO)
2726 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2727 __FILE__,__LINE__,tty->driver->name, info->count);
2729 /* If port is closing, signal caller to try again */
2730 if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
2731 if (info->flags & ASYNC_CLOSING)
2732 interruptible_sleep_on(&info->close_wait);
2733 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2734 -EAGAIN : -ERESTARTSYS);
2738 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2740 spin_lock_irqsave(&info->netlock, flags);
2741 if (info->netcount) {
2743 spin_unlock_irqrestore(&info->netlock, flags);
2747 spin_unlock_irqrestore(&info->netlock, flags);
2749 if (info->count == 1) {
2750 /* 1st open on this device, init hardware */
2751 retval = startup(info);
2756 retval = block_til_ready(tty, filp, info);
2758 if (debug_level >= DEBUG_LEVEL_INFO)
2759 printk("%s(%d):block_til_ready(%s) returned %d\n",
2760 __FILE__,__LINE__, info->device_name, retval);
2764 if (debug_level >= DEBUG_LEVEL_INFO)
2765 printk("%s(%d):mgslpc_open(%s) success\n",
2766 __FILE__,__LINE__, info->device_name);
2771 if (tty->count == 1)
2772 info->tty = NULL; /* tty layer will release tty struct */
2781 * /proc fs routines....
2784 static inline int line_info(char *buf, MGSLPC_INFO *info)
2788 unsigned long flags;
2790 ret = sprintf(buf, "%s:io:%04X irq:%d",
2791 info->device_name, info->io_base, info->irq_level);
2793 /* output current serial signal states */
2794 spin_lock_irqsave(&info->lock,flags);
2796 spin_unlock_irqrestore(&info->lock,flags);
2800 if (info->serial_signals & SerialSignal_RTS)
2801 strcat(stat_buf, "|RTS");
2802 if (info->serial_signals & SerialSignal_CTS)
2803 strcat(stat_buf, "|CTS");
2804 if (info->serial_signals & SerialSignal_DTR)
2805 strcat(stat_buf, "|DTR");
2806 if (info->serial_signals & SerialSignal_DSR)
2807 strcat(stat_buf, "|DSR");
2808 if (info->serial_signals & SerialSignal_DCD)
2809 strcat(stat_buf, "|CD");
2810 if (info->serial_signals & SerialSignal_RI)
2811 strcat(stat_buf, "|RI");
2813 if (info->params.mode == MGSL_MODE_HDLC) {
2814 ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
2815 info->icount.txok, info->icount.rxok);
2816 if (info->icount.txunder)
2817 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
2818 if (info->icount.txabort)
2819 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
2820 if (info->icount.rxshort)
2821 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
2822 if (info->icount.rxlong)
2823 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
2824 if (info->icount.rxover)
2825 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
2826 if (info->icount.rxcrc)
2827 ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
2829 ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
2830 info->icount.tx, info->icount.rx);
2831 if (info->icount.frame)
2832 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
2833 if (info->icount.parity)
2834 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
2835 if (info->icount.brk)
2836 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
2837 if (info->icount.overrun)
2838 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
2841 /* Append serial signal status to end */
2842 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
2844 ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2845 info->tx_active,info->bh_requested,info->bh_running,
2851 /* Called to print information about devices
2853 static int mgslpc_read_proc(char *page, char **start, off_t off, int count,
2854 int *eof, void *data)
2860 len += sprintf(page, "synclink driver:%s\n", driver_version);
2862 info = mgslpc_device_list;
2864 l = line_info(page + len, info);
2866 if (len+begin > off+count)
2868 if (len+begin < off) {
2872 info = info->next_device;
2877 if (off >= len+begin)
2879 *start = page + (off-begin);
2880 return ((count < begin+len-off) ? count : begin+len-off);
2883 static int rx_alloc_buffers(MGSLPC_INFO *info)
2885 /* each buffer has header and data */
2886 info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
2888 /* calculate total allocation size for 8 buffers */
2889 info->rx_buf_total_size = info->rx_buf_size * 8;
2891 /* limit total allocated memory */
2892 if (info->rx_buf_total_size > 0x10000)
2893 info->rx_buf_total_size = 0x10000;
2895 /* calculate number of buffers */
2896 info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
2898 info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
2899 if (info->rx_buf == NULL)
2902 rx_reset_buffers(info);
2906 static void rx_free_buffers(MGSLPC_INFO *info)
2908 kfree(info->rx_buf);
2909 info->rx_buf = NULL;
2912 static int claim_resources(MGSLPC_INFO *info)
2914 if (rx_alloc_buffers(info) < 0 ) {
2915 printk( "Cant allocate rx buffer %s\n", info->device_name);
2916 release_resources(info);
2922 static void release_resources(MGSLPC_INFO *info)
2924 if (debug_level >= DEBUG_LEVEL_INFO)
2925 printk("release_resources(%s)\n", info->device_name);
2926 rx_free_buffers(info);
2929 /* Add the specified device instance data structure to the
2930 * global linked list of devices and increment the device count.
2932 * Arguments: info pointer to device instance data
2934 static void mgslpc_add_device(MGSLPC_INFO *info)
2936 info->next_device = NULL;
2937 info->line = mgslpc_device_count;
2938 sprintf(info->device_name,"ttySLP%d",info->line);
2940 if (info->line < MAX_DEVICE_COUNT) {
2941 if (maxframe[info->line])
2942 info->max_frame_size = maxframe[info->line];
2943 info->dosyncppp = dosyncppp[info->line];
2946 mgslpc_device_count++;
2948 if (!mgslpc_device_list)
2949 mgslpc_device_list = info;
2951 MGSLPC_INFO *current_dev = mgslpc_device_list;
2952 while( current_dev->next_device )
2953 current_dev = current_dev->next_device;
2954 current_dev->next_device = info;
2957 if (info->max_frame_size < 4096)
2958 info->max_frame_size = 4096;
2959 else if (info->max_frame_size > 65535)
2960 info->max_frame_size = 65535;
2962 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2963 info->device_name, info->io_base, info->irq_level);
2970 static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
2972 MGSLPC_INFO *info = mgslpc_device_list;
2973 MGSLPC_INFO *last = NULL;
2976 if (info == remove_info) {
2978 last->next_device = info->next_device;
2980 mgslpc_device_list = info->next_device;
2984 release_resources(info);
2986 mgslpc_device_count--;
2990 info = info->next_device;
2994 static struct pcmcia_device_id mgslpc_ids[] = {
2995 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2998 MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids);
3000 static struct pcmcia_driver mgslpc_driver = {
3001 .owner = THIS_MODULE,
3003 .name = "synclink_cs",
3005 .probe = mgslpc_probe,
3006 .remove = mgslpc_detach,
3007 .id_table = mgslpc_ids,
3008 .suspend = mgslpc_suspend,
3009 .resume = mgslpc_resume,
3012 static const struct tty_operations mgslpc_ops = {
3013 .open = mgslpc_open,
3014 .close = mgslpc_close,
3015 .write = mgslpc_write,
3016 .put_char = mgslpc_put_char,
3017 .flush_chars = mgslpc_flush_chars,
3018 .write_room = mgslpc_write_room,
3019 .chars_in_buffer = mgslpc_chars_in_buffer,
3020 .flush_buffer = mgslpc_flush_buffer,
3021 .ioctl = mgslpc_ioctl,
3022 .throttle = mgslpc_throttle,
3023 .unthrottle = mgslpc_unthrottle,
3024 .send_xchar = mgslpc_send_xchar,
3025 .break_ctl = mgslpc_break,
3026 .wait_until_sent = mgslpc_wait_until_sent,
3027 .read_proc = mgslpc_read_proc,
3028 .set_termios = mgslpc_set_termios,
3030 .start = tx_release,
3031 .hangup = mgslpc_hangup,
3032 .tiocmget = tiocmget,
3033 .tiocmset = tiocmset,
3036 static void synclink_cs_cleanup(void)
3040 printk("Unloading %s: version %s\n", driver_name, driver_version);
3042 while(mgslpc_device_list)
3043 mgslpc_remove_device(mgslpc_device_list);
3045 if (serial_driver) {
3046 if ((rc = tty_unregister_driver(serial_driver)))
3047 printk("%s(%d) failed to unregister tty driver err=%d\n",
3048 __FILE__,__LINE__,rc);
3049 put_tty_driver(serial_driver);
3052 pcmcia_unregister_driver(&mgslpc_driver);
3055 static int __init synclink_cs_init(void)
3059 if (break_on_load) {
3060 mgslpc_get_text_ptr();
3064 printk("%s %s\n", driver_name, driver_version);
3066 if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0)
3069 serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT);
3070 if (!serial_driver) {
3075 /* Initialize the tty_driver structure */
3077 serial_driver->owner = THIS_MODULE;
3078 serial_driver->driver_name = "synclink_cs";
3079 serial_driver->name = "ttySLP";
3080 serial_driver->major = ttymajor;
3081 serial_driver->minor_start = 64;
3082 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
3083 serial_driver->subtype = SERIAL_TYPE_NORMAL;
3084 serial_driver->init_termios = tty_std_termios;
3085 serial_driver->init_termios.c_cflag =
3086 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3087 serial_driver->flags = TTY_DRIVER_REAL_RAW;
3088 tty_set_operations(serial_driver, &mgslpc_ops);
3090 if ((rc = tty_register_driver(serial_driver)) < 0) {
3091 printk("%s(%d):Couldn't register serial driver\n",
3093 put_tty_driver(serial_driver);
3094 serial_driver = NULL;
3098 printk("%s %s, tty major#%d\n",
3099 driver_name, driver_version,
3100 serial_driver->major);
3105 synclink_cs_cleanup();
3109 static void __exit synclink_cs_exit(void)
3111 synclink_cs_cleanup();
3114 module_init(synclink_cs_init);
3115 module_exit(synclink_cs_exit);
3117 static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
3122 /* note:standard BRG mode is broken in V3.2 chip
3123 * so enhanced mode is always used
3131 for (M = 1; N > 64 && M < 16; M++)
3137 * BGR[7..0] contained in BGR register
3138 * BGR[9..8] contained in CCR2[7..6]
3139 * divisor = (N+1)*2^M
3141 * Note: M *must* not be zero (causes asymetric duty cycle)
3143 write_reg(info, (unsigned char) (channel + BGR),
3144 (unsigned char) ((M << 6) + N));
3145 val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
3146 val |= ((M << 4) & 0xc0);
3147 write_reg(info, (unsigned char) (channel + CCR2), val);
3151 /* Enabled the AUX clock output at the specified frequency.
3153 static void enable_auxclk(MGSLPC_INFO *info)
3159 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3160 * 05 ADM Address Mode, 0 = no addr recognition
3161 * 04 TMD Timer Mode, 0 = external
3162 * 03 RAC Receiver Active, 0 = inactive
3163 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3164 * 01 TRS Timer Resolution, 1=512
3165 * 00 TLP Test Loop, 0 = no loop
3171 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3172 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3174 write_reg(info, CHB + MODE, val);
3178 * 07 PU Power Up, 1=active, 0=power down
3179 * 06 MCE Master Clock Enable, 1=enabled
3181 * 04..02 SC[2..0] Encoding
3182 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3186 write_reg(info, CHB + CCR0, 0xc0);
3190 * 07 SFLG Shared Flag, 0 = disable shared flags
3191 * 06 GALP Go Active On Loop, 0 = not used
3192 * 05 GLP Go On Loop, 0 = not used
3193 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3194 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3195 * 02..00 CM[2..0] Clock Mode
3199 write_reg(info, CHB + CCR1, 0x17);
3203 * 07..06 BGR[9..8] Baud rate bits 9..8
3204 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3205 * 04 SSEL Clock source select, 1=submode b
3206 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3207 * 02 RWX Read/Write Exchange 0=disabled
3208 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3209 * 00 DIV, data inversion 0=disabled, 1=enabled
3213 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3214 write_reg(info, CHB + CCR2, 0x38);
3216 write_reg(info, CHB + CCR2, 0x30);
3220 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3221 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3222 * 05 TST1 Test Pin, 0=normal operation
3223 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3224 * 03..02 Reserved, must be 0
3225 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3229 write_reg(info, CHB + CCR4, 0x50);
3231 /* if auxclk not enabled, set internal BRG so
3232 * CTS transitions can be detected (requires TxC)
3234 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3235 mgslpc_set_rate(info, CHB, info->params.clock_speed);
3237 mgslpc_set_rate(info, CHB, 921600);
3240 static void loopback_enable(MGSLPC_INFO *info)
3244 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3245 val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0);
3246 write_reg(info, CHA + CCR1, val);
3248 /* CCR2:04 SSEL Clock source select, 1=submode b */
3249 val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5);
3250 write_reg(info, CHA + CCR2, val);
3252 /* set LinkSpeed if available, otherwise default to 2Mbps */
3253 if (info->params.clock_speed)
3254 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3256 mgslpc_set_rate(info, CHA, 1843200);
3258 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3259 val = read_reg(info, CHA + MODE) | BIT0;
3260 write_reg(info, CHA + MODE, val);
3263 static void hdlc_mode(MGSLPC_INFO *info)
3266 unsigned char clkmode, clksubmode;
3268 /* disable all interrupts */
3269 irq_disable(info, CHA, 0xffff);
3270 irq_disable(info, CHB, 0xffff);
3271 port_irq_disable(info, 0xff);
3273 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3274 clkmode = clksubmode = 0;
3275 if (info->params.flags & HDLC_FLAG_RXC_DPLL
3276 && info->params.flags & HDLC_FLAG_TXC_DPLL) {
3277 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3279 } else if (info->params.flags & HDLC_FLAG_RXC_BRG
3280 && info->params.flags & HDLC_FLAG_TXC_BRG) {
3281 /* clock mode 7b, rcv = BRG, xmt = BRG */
3284 } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
3285 if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3286 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3290 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3293 } else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3294 /* clock mode 0b, rcv = RxC, xmt = BRG */
3300 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3301 * 05 ADM Address Mode, 0 = no addr recognition
3302 * 04 TMD Timer Mode, 0 = external
3303 * 03 RAC Receiver Active, 0 = inactive
3304 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3305 * 01 TRS Timer Resolution, 1=512
3306 * 00 TLP Test Loop, 0 = no loop
3311 if (info->params.loopback)
3314 /* preserve RTS state */
3315 if (info->serial_signals & SerialSignal_RTS)
3317 write_reg(info, CHA + MODE, val);
3321 * 07 PU Power Up, 1=active, 0=power down
3322 * 06 MCE Master Clock Enable, 1=enabled
3324 * 04..02 SC[2..0] Encoding
3325 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3330 switch (info->params.encoding)
3332 case HDLC_ENCODING_NRZI:
3335 case HDLC_ENCODING_BIPHASE_SPACE:
3338 case HDLC_ENCODING_BIPHASE_MARK:
3341 case HDLC_ENCODING_BIPHASE_LEVEL:
3343 break; // Manchester
3345 write_reg(info, CHA + CCR0, val);
3349 * 07 SFLG Shared Flag, 0 = disable shared flags
3350 * 06 GALP Go Active On Loop, 0 = not used
3351 * 05 GLP Go On Loop, 0 = not used
3352 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3353 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3354 * 02..00 CM[2..0] Clock Mode
3358 val = 0x10 + clkmode;
3359 write_reg(info, CHA + CCR1, val);
3363 * 07..06 BGR[9..8] Baud rate bits 9..8
3364 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3365 * 04 SSEL Clock source select, 1=submode b
3366 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3367 * 02 RWX Read/Write Exchange 0=disabled
3368 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3369 * 00 DIV, data inversion 0=disabled, 1=enabled
3374 if (clkmode == 2 || clkmode == 3 || clkmode == 6
3375 || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
3379 if (info->params.crc_type == HDLC_CRC_32_CCITT)
3381 if (info->params.encoding == HDLC_ENCODING_NRZB)
3383 write_reg(info, CHA + CCR2, val);
3387 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3388 * 05 EPT Enable preamble transmission, 1=enabled
3389 * 04 RADD Receive address pushed to FIFO, 0=disabled
3390 * 03 CRL CRC Reset Level, 0=FFFF
3391 * 02 RCRC Rx CRC 0=On 1=Off
3392 * 01 TCRC Tx CRC 0=On 1=Off
3393 * 00 PSD DPLL Phase Shift Disable
3398 if (info->params.crc_type == HDLC_CRC_NONE)
3400 if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
3402 switch (info->params.preamble_length)
3404 case HDLC_PREAMBLE_LENGTH_16BITS:
3407 case HDLC_PREAMBLE_LENGTH_32BITS:
3410 case HDLC_PREAMBLE_LENGTH_64BITS:
3414 write_reg(info, CHA + CCR3, val);
3416 /* PRE - Preamble pattern */
3418 switch (info->params.preamble)
3420 case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
3421 case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break;
3422 case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break;
3423 case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
3425 write_reg(info, CHA + PRE, val);
3429 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3430 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3431 * 05 TST1 Test Pin, 0=normal operation
3432 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3433 * 03..02 Reserved, must be 0
3434 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3439 write_reg(info, CHA + CCR4, val);
3440 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
3441 mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
3443 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3445 /* RLCR Receive length check register
3447 * 7 1=enable receive length check
3448 * 6..0 Max frame length = (RL + 1) * 32
3450 write_reg(info, CHA + RLCR, 0);
3452 /* XBCH Transmit Byte Count High
3454 * 07 DMA mode, 0 = interrupt driven
3455 * 06 NRM, 0=ABM (ignored)
3456 * 05 CAS Carrier Auto Start
3457 * 04 XC Transmit Continuously (ignored)
3458 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3463 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3465 write_reg(info, CHA + XBCH, val);
3466 enable_auxclk(info);
3467 if (info->params.loopback || info->testing_irq)
3468 loopback_enable(info);
3469 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3471 irq_enable(info, CHB, IRQ_CTS);
3472 /* PVR[3] 1=AUTO CTS active */
3473 set_reg_bits(info, CHA + PVR, BIT3);
3475 clear_reg_bits(info, CHA + PVR, BIT3);
3477 irq_enable(info, CHA,
3478 IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT +
3479 IRQ_UNDERRUN + IRQ_TXFIFO);
3480 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3481 wait_command_complete(info, CHA);
3482 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3484 /* Master clock mode enabled above to allow reset commands
3485 * to complete even if no data clocks are present.
3487 * Disable master clock mode for normal communications because
3488 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3489 * IRQ when in master clock mode.
3491 * Leave master clock mode enabled for IRQ test because the
3492 * timer IRQ used by the test can only happen in master clock mode.
3494 if (!info->testing_irq)
3495 clear_reg_bits(info, CHA + CCR0, BIT6);
3503 static void rx_stop(MGSLPC_INFO *info)
3505 if (debug_level >= DEBUG_LEVEL_ISR)
3506 printk("%s(%d):rx_stop(%s)\n",
3507 __FILE__,__LINE__, info->device_name );
3509 /* MODE:03 RAC Receiver Active, 0=inactive */
3510 clear_reg_bits(info, CHA + MODE, BIT3);
3512 info->rx_enabled = 0;
3513 info->rx_overflow = 0;
3516 static void rx_start(MGSLPC_INFO *info)
3518 if (debug_level >= DEBUG_LEVEL_ISR)
3519 printk("%s(%d):rx_start(%s)\n",
3520 __FILE__,__LINE__, info->device_name );
3522 rx_reset_buffers(info);
3523 info->rx_enabled = 0;
3524 info->rx_overflow = 0;
3526 /* MODE:03 RAC Receiver Active, 1=active */
3527 set_reg_bits(info, CHA + MODE, BIT3);
3529 info->rx_enabled = 1;
3532 static void tx_start(MGSLPC_INFO *info)
3534 if (debug_level >= DEBUG_LEVEL_ISR)
3535 printk("%s(%d):tx_start(%s)\n",
3536 __FILE__,__LINE__, info->device_name );
3538 if (info->tx_count) {
3539 /* If auto RTS enabled and RTS is inactive, then assert */
3540 /* RTS and set a flag indicating that the driver should */
3541 /* negate RTS when the transmission completes. */
3542 info->drop_rts_on_tx_done = 0;
3544 if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
3546 if (!(info->serial_signals & SerialSignal_RTS)) {
3547 info->serial_signals |= SerialSignal_RTS;
3549 info->drop_rts_on_tx_done = 1;
3553 if (info->params.mode == MGSL_MODE_ASYNC) {
3554 if (!info->tx_active) {
3555 info->tx_active = 1;
3559 info->tx_active = 1;
3561 info->tx_timer.expires = jiffies + msecs_to_jiffies(5000);
3562 add_timer(&info->tx_timer);
3566 if (!info->tx_enabled)
3567 info->tx_enabled = 1;
3570 static void tx_stop(MGSLPC_INFO *info)
3572 if (debug_level >= DEBUG_LEVEL_ISR)
3573 printk("%s(%d):tx_stop(%s)\n",
3574 __FILE__,__LINE__, info->device_name );
3576 del_timer(&info->tx_timer);
3578 info->tx_enabled = 0;
3579 info->tx_active = 0;
3582 /* Reset the adapter to a known state and prepare it for further use.
3584 static void reset_device(MGSLPC_INFO *info)
3586 /* power up both channels (set BIT7) */
3587 write_reg(info, CHA + CCR0, 0x80);
3588 write_reg(info, CHB + CCR0, 0x80);
3589 write_reg(info, CHA + MODE, 0);
3590 write_reg(info, CHB + MODE, 0);
3592 /* disable all interrupts */
3593 irq_disable(info, CHA, 0xffff);
3594 irq_disable(info, CHB, 0xffff);
3595 port_irq_disable(info, 0xff);
3597 /* PCR Port Configuration Register
3599 * 07..04 DEC[3..0] Serial I/F select outputs
3600 * 03 output, 1=AUTO CTS control enabled
3601 * 02 RI Ring Indicator input 0=active
3602 * 01 DSR input 0=active
3603 * 00 DTR output 0=active
3607 write_reg(info, PCR, 0x06);
3609 /* PVR Port Value Register
3611 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3612 * 03 AUTO CTS output 1=enabled
3613 * 02 RI Ring Indicator input
3615 * 00 DTR output (1=inactive)
3619 // write_reg(info, PVR, PVR_DTR);
3621 /* IPC Interrupt Port Configuration
3623 * 07 VIS 1=Masked interrupts visible
3624 * 06..05 Reserved, 0
3625 * 04..03 SLA Slave address, 00 ignored
3626 * 02 CASM Cascading Mode, 1=daisy chain
3627 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3631 write_reg(info, IPC, 0x05);
3634 static void async_mode(MGSLPC_INFO *info)
3638 /* disable all interrupts */
3639 irq_disable(info, CHA, 0xffff);
3640 irq_disable(info, CHB, 0xffff);
3641 port_irq_disable(info, 0xff);
3646 * 06 FRTS RTS State, 0=active
3647 * 05 FCTS Flow Control on CTS
3648 * 04 FLON Flow Control Enable
3649 * 03 RAC Receiver Active, 0 = inactive
3650 * 02 RTS 0=Auto RTS, 1=manual RTS
3651 * 01 TRS Timer Resolution, 1=512
3652 * 00 TLP Test Loop, 0 = no loop
3657 if (info->params.loopback)
3660 /* preserve RTS state */
3661 if (!(info->serial_signals & SerialSignal_RTS))
3663 write_reg(info, CHA + MODE, val);
3667 * 07 PU Power Up, 1=active, 0=power down
3668 * 06 MCE Master Clock Enable, 1=enabled
3670 * 04..02 SC[2..0] Encoding, 000=NRZ
3671 * 01..00 SM[1..0] Serial Mode, 11=Async
3675 write_reg(info, CHA + CCR0, 0x83);
3679 * 07..05 Reserved, 0
3680 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3681 * 03 BCR Bit Clock Rate, 1=16x
3682 * 02..00 CM[2..0] Clock Mode, 111=BRG
3686 write_reg(info, CHA + CCR1, 0x1f);
3690 * 07..06 BGR[9..8] Baud rate bits 9..8
3691 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3692 * 04 SSEL Clock source select, 1=submode b
3693 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3694 * 02 RWX Read/Write Exchange 0=disabled
3696 * 00 DIV, data inversion 0=disabled, 1=enabled
3700 write_reg(info, CHA + CCR2, 0x10);
3704 * 07..01 Reserved, 0
3705 * 00 PSD DPLL Phase Shift Disable
3709 write_reg(info, CHA + CCR3, 0);
3713 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3714 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3715 * 05 TST1 Test Pin, 0=normal operation
3716 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3717 * 03..00 Reserved, must be 0
3721 write_reg(info, CHA + CCR4, 0x50);
3722 mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
3727 * 06 XBRK transmit break, 0=normal operation
3728 * 05 Stop bits (0=1, 1=2)
3729 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3730 * 02 PAREN Parity Enable
3731 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3735 if (info->params.data_bits != 8)
3736 val |= BIT0; /* 7 bits */
3737 if (info->params.stop_bits != 1)
3739 if (info->params.parity != ASYNC_PARITY_NONE)
3741 val |= BIT2; /* Parity enable */
3742 if (info->params.parity == ASYNC_PARITY_ODD)
3747 write_reg(info, CHA + DAFO, val);
3749 /* RFC Rx FIFO Control
3752 * 06 DPS, 1=parity bit not stored in data byte
3753 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3754 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3755 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3757 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3761 write_reg(info, CHA + RFC, 0x5c);
3763 /* RLCR Receive length check register
3765 * Max frame length = (RL + 1) * 32
3767 write_reg(info, CHA + RLCR, 0);
3769 /* XBCH Transmit Byte Count High
3771 * 07 DMA mode, 0 = interrupt driven
3772 * 06 NRM, 0=ABM (ignored)
3773 * 05 CAS Carrier Auto Start
3774 * 04 XC Transmit Continuously (ignored)
3775 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3780 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3782 write_reg(info, CHA + XBCH, val);
3783 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3784 irq_enable(info, CHA, IRQ_CTS);
3786 /* MODE:03 RAC Receiver Active, 1=active */
3787 set_reg_bits(info, CHA + MODE, BIT3);
3788 enable_auxclk(info);
3789 if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
3790 irq_enable(info, CHB, IRQ_CTS);
3791 /* PVR[3] 1=AUTO CTS active */
3792 set_reg_bits(info, CHA + PVR, BIT3);
3794 clear_reg_bits(info, CHA + PVR, BIT3);
3795 irq_enable(info, CHA,
3796 IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME +
3797 IRQ_ALLSENT + IRQ_TXFIFO);
3798 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3799 wait_command_complete(info, CHA);
3800 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3803 /* Set the HDLC idle mode for the transmitter.
3805 static void tx_set_idle(MGSLPC_INFO *info)
3807 /* Note: ESCC2 only supports flags and one idle modes */
3808 if (info->idle_mode == HDLC_TXIDLE_FLAGS)
3809 set_reg_bits(info, CHA + CCR1, BIT3);
3811 clear_reg_bits(info, CHA + CCR1, BIT3);
3814 /* get state of the V24 status (input) signals.
3816 static void get_signals(MGSLPC_INFO *info)
3818 unsigned char status = 0;
3820 /* preserve DTR and RTS */
3821 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
3823 if (read_reg(info, CHB + VSTR) & BIT7)
3824 info->serial_signals |= SerialSignal_DCD;
3825 if (read_reg(info, CHB + STAR) & BIT1)
3826 info->serial_signals |= SerialSignal_CTS;
3828 status = read_reg(info, CHA + PVR);
3829 if (!(status & PVR_RI))
3830 info->serial_signals |= SerialSignal_RI;
3831 if (!(status & PVR_DSR))
3832 info->serial_signals |= SerialSignal_DSR;
3835 /* Set the state of DTR and RTS based on contents of
3836 * serial_signals member of device extension.
3838 static void set_signals(MGSLPC_INFO *info)
3842 val = read_reg(info, CHA + MODE);
3843 if (info->params.mode == MGSL_MODE_ASYNC) {
3844 if (info->serial_signals & SerialSignal_RTS)
3849 if (info->serial_signals & SerialSignal_RTS)
3854 write_reg(info, CHA + MODE, val);
3856 if (info->serial_signals & SerialSignal_DTR)
3857 clear_reg_bits(info, CHA + PVR, PVR_DTR);
3859 set_reg_bits(info, CHA + PVR, PVR_DTR);
3862 static void rx_reset_buffers(MGSLPC_INFO *info)
3869 info->rx_frame_count = 0;
3870 for (i=0 ; i < info->rx_buf_count ; i++) {
3871 buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
3872 buf->status = buf->count = 0;
3876 /* Attempt to return a received HDLC frame
3877 * Only frames received without errors are returned.
3879 * Returns 1 if frame returned, otherwise 0
3881 static int rx_get_frame(MGSLPC_INFO *info)
3883 unsigned short status;
3885 unsigned int framesize = 0;
3886 unsigned long flags;
3887 struct tty_struct *tty = info->tty;
3888 int return_frame = 0;
3890 if (info->rx_frame_count == 0)
3893 buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
3895 status = buf->status;
3897 /* 07 VFR 1=valid frame
3898 * 06 RDO 1=data overrun
3899 * 05 CRC 1=OK, 0=error
3900 * 04 RAB 1=frame aborted
3902 if ((status & 0xf0) != 0xA0) {
3903 if (!(status & BIT7) || (status & BIT4))
3904 info->icount.rxabort++;
3905 else if (status & BIT6)
3906 info->icount.rxover++;
3907 else if (!(status & BIT5)) {
3908 info->icount.rxcrc++;
3909 if (info->params.crc_type & HDLC_CRC_RETURN_EX)
3915 struct net_device_stats *stats = hdlc_stats(info->netdev);
3917 stats->rx_frame_errors++;
3924 framesize = buf->count;
3926 if (debug_level >= DEBUG_LEVEL_BH)
3927 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3928 __FILE__,__LINE__,info->device_name,status,framesize);
3930 if (debug_level >= DEBUG_LEVEL_DATA)
3931 trace_block(info, buf->data, framesize, 0);
3934 if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
3935 framesize+1 > info->max_frame_size) ||
3936 framesize > info->max_frame_size)
3937 info->icount.rxlong++;
3940 info->icount.rxok++;
3942 if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
3943 *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
3949 hdlcdev_rx(info, buf->data, framesize);
3952 ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize);
3956 spin_lock_irqsave(&info->lock,flags);
3957 buf->status = buf->count = 0;
3958 info->rx_frame_count--;
3960 if (info->rx_get >= info->rx_buf_count)
3962 spin_unlock_irqrestore(&info->lock,flags);
3967 static BOOLEAN register_test(MGSLPC_INFO *info)
3969 static unsigned char patterns[] =
3970 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3971 static unsigned int count = ARRAY_SIZE(patterns);
3974 unsigned long flags;
3976 spin_lock_irqsave(&info->lock,flags);
3979 for (i = 0; i < count; i++) {
3980 write_reg(info, XAD1, patterns[i]);
3981 write_reg(info, XAD2, patterns[(i + 1) % count]);
3982 if ((read_reg(info, XAD1) != patterns[i]) ||
3983 (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
3989 spin_unlock_irqrestore(&info->lock,flags);
3993 static BOOLEAN irq_test(MGSLPC_INFO *info)
3995 unsigned long end_time;
3996 unsigned long flags;
3998 spin_lock_irqsave(&info->lock,flags);
4001 info->testing_irq = TRUE;
4004 info->irq_occurred = FALSE;
4006 /* init hdlc mode */
4008 irq_enable(info, CHA, IRQ_TIMER);
4009 write_reg(info, CHA + TIMR, 0); /* 512 cycles */
4010 issue_command(info, CHA, CMD_START_TIMER);
4012 spin_unlock_irqrestore(&info->lock,flags);
4015 while(end_time-- && !info->irq_occurred) {
4016 msleep_interruptible(10);
4019 info->testing_irq = FALSE;
4021 spin_lock_irqsave(&info->lock,flags);
4023 spin_unlock_irqrestore(&info->lock,flags);
4025 return info->irq_occurred ? TRUE : FALSE;
4028 static int adapter_test(MGSLPC_INFO *info)
4030 if (!register_test(info)) {
4031 info->init_error = DiagStatus_AddressFailure;
4032 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4033 __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
4037 if (!irq_test(info)) {
4038 info->init_error = DiagStatus_IrqFailure;
4039 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4040 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
4044 if (debug_level >= DEBUG_LEVEL_INFO)
4045 printk("%s(%d):device %s passed diagnostics\n",
4046 __FILE__,__LINE__,info->device_name);
4050 static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
4055 printk("%s tx data:\n",info->device_name);
4057 printk("%s rx data:\n",info->device_name);
4065 for(i=0;i<linecount;i++)
4066 printk("%02X ",(unsigned char)data[i]);
4069 for(i=0;i<linecount;i++) {
4070 if (data[i]>=040 && data[i]<=0176)
4071 printk("%c",data[i]);
4082 /* HDLC frame time out
4083 * update stats and do tx completion processing
4085 static void tx_timeout(unsigned long context)
4087 MGSLPC_INFO *info = (MGSLPC_INFO*)context;
4088 unsigned long flags;
4090 if ( debug_level >= DEBUG_LEVEL_INFO )
4091 printk( "%s(%d):tx_timeout(%s)\n",
4092 __FILE__,__LINE__,info->device_name);
4093 if(info->tx_active &&
4094 info->params.mode == MGSL_MODE_HDLC) {
4095 info->icount.txtimeout++;
4097 spin_lock_irqsave(&info->lock,flags);
4098 info->tx_active = 0;
4099 info->tx_count = info->tx_put = info->tx_get = 0;
4101 spin_unlock_irqrestore(&info->lock,flags);
4105 hdlcdev_tx_done(info);
4114 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4115 * set encoding and frame check sequence (FCS) options
4117 * dev pointer to network device structure
4118 * encoding serial encoding setting
4119 * parity FCS setting
4121 * returns 0 if success, otherwise error code
4123 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
4124 unsigned short parity)
4126 MGSLPC_INFO *info = dev_to_port(dev);
4127 unsigned char new_encoding;
4128 unsigned short new_crctype;
4130 /* return error if TTY interface open */
4136 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
4137 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
4138 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
4139 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
4140 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
4141 default: return -EINVAL;
4146 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
4147 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
4148 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
4149 default: return -EINVAL;
4152 info->params.encoding = new_encoding;
4153 info->params.crc_type = new_crctype;
4155 /* if network interface up, reprogram hardware */
4157 mgslpc_program_hw(info);
4163 * called by generic HDLC layer to send frame
4165 * skb socket buffer containing HDLC frame
4166 * dev pointer to network device structure
4168 * returns 0 if success, otherwise error code
4170 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
4172 MGSLPC_INFO *info = dev_to_port(dev);
4173 struct net_device_stats *stats = hdlc_stats(dev);
4174 unsigned long flags;
4176 if (debug_level >= DEBUG_LEVEL_INFO)
4177 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
4179 /* stop sending until this frame completes */
4180 netif_stop_queue(dev);
4182 /* copy data to device buffers */
4183 memcpy(info->tx_buf, skb->data, skb->len);
4185 info->tx_put = info->tx_count = skb->len;
4187 /* update network statistics */
4188 stats->tx_packets++;
4189 stats->tx_bytes += skb->len;
4191 /* done with socket buffer, so free it */
4194 /* save start time for transmit timeout detection */
4195 dev->trans_start = jiffies;
4197 /* start hardware transmitter if necessary */
4198 spin_lock_irqsave(&info->lock,flags);
4199 if (!info->tx_active)
4201 spin_unlock_irqrestore(&info->lock,flags);
4207 * called by network layer when interface enabled
4208 * claim resources and initialize hardware
4210 * dev pointer to network device structure
4212 * returns 0 if success, otherwise error code
4214 static int hdlcdev_open(struct net_device *dev)
4216 MGSLPC_INFO *info = dev_to_port(dev);
4218 unsigned long flags;
4220 if (debug_level >= DEBUG_LEVEL_INFO)
4221 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
4223 /* generic HDLC layer open processing */
4224 if ((rc = hdlc_open(dev)))
4227 /* arbitrate between network and tty opens */
4228 spin_lock_irqsave(&info->netlock, flags);
4229 if (info->count != 0 || info->netcount != 0) {
4230 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
4231 spin_unlock_irqrestore(&info->netlock, flags);
4235 spin_unlock_irqrestore(&info->netlock, flags);
4237 /* claim resources and init adapter */
4238 if ((rc = startup(info)) != 0) {
4239 spin_lock_irqsave(&info->netlock, flags);
4241 spin_unlock_irqrestore(&info->netlock, flags);
4245 /* assert DTR and RTS, apply hardware settings */
4246 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
4247 mgslpc_program_hw(info);
4249 /* enable network layer transmit */
4250 dev->trans_start = jiffies;
4251 netif_start_queue(dev);
4253 /* inform generic HDLC layer of current DCD status */
4254 spin_lock_irqsave(&info->lock, flags);
4256 spin_unlock_irqrestore(&info->lock, flags);
4257 if (info->serial_signals & SerialSignal_DCD)
4258 netif_carrier_on(dev);
4260 netif_carrier_off(dev);
4265 * called by network layer when interface is disabled
4266 * shutdown hardware and release resources
4268 * dev pointer to network device structure
4270 * returns 0 if success, otherwise error code
4272 static int hdlcdev_close(struct net_device *dev)
4274 MGSLPC_INFO *info = dev_to_port(dev);
4275 unsigned long flags;
4277 if (debug_level >= DEBUG_LEVEL_INFO)
4278 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
4280 netif_stop_queue(dev);
4282 /* shutdown adapter and release resources */
4287 spin_lock_irqsave(&info->netlock, flags);
4289 spin_unlock_irqrestore(&info->netlock, flags);
4295 * called by network layer to process IOCTL call to network device
4297 * dev pointer to network device structure
4298 * ifr pointer to network interface request structure
4299 * cmd IOCTL command code
4301 * returns 0 if success, otherwise error code
4303 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
4305 const size_t size = sizeof(sync_serial_settings);
4306 sync_serial_settings new_line;
4307 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
4308 MGSLPC_INFO *info = dev_to_port(dev);
4311 if (debug_level >= DEBUG_LEVEL_INFO)
4312 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
4314 /* return error if TTY interface open */
4318 if (cmd != SIOCWANDEV)
4319 return hdlc_ioctl(dev, ifr, cmd);
4321 switch(ifr->ifr_settings.type) {
4322 case IF_GET_IFACE: /* return current sync_serial_settings */
4324 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
4325 if (ifr->ifr_settings.size < size) {
4326 ifr->ifr_settings.size = size; /* data size wanted */
4330 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4331 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4332 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4333 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4336 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
4337 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
4338 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
4339 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
4340 default: new_line.clock_type = CLOCK_DEFAULT;
4343 new_line.clock_rate = info->params.clock_speed;
4344 new_line.loopback = info->params.loopback ? 1:0;
4346 if (copy_to_user(line, &new_line, size))
4350 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
4352 if(!capable(CAP_NET_ADMIN))
4354 if (copy_from_user(&new_line, line, size))
4357 switch (new_line.clock_type)
4359 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
4360 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
4361 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
4362 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
4363 case CLOCK_DEFAULT: flags = info->params.flags &
4364 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4365 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4366 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4367 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
4368 default: return -EINVAL;
4371 if (new_line.loopback != 0 && new_line.loopback != 1)
4374 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4375 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4376 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4377 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4378 info->params.flags |= flags;
4380 info->params.loopback = new_line.loopback;
4382 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
4383 info->params.clock_speed = new_line.clock_rate;
4385 info->params.clock_speed = 0;
4387 /* if network interface up, reprogram hardware */
4389 mgslpc_program_hw(info);
4393 return hdlc_ioctl(dev, ifr, cmd);
4398 * called by network layer when transmit timeout is detected
4400 * dev pointer to network device structure
4402 static void hdlcdev_tx_timeout(struct net_device *dev)
4404 MGSLPC_INFO *info = dev_to_port(dev);
4405 struct net_device_stats *stats = hdlc_stats(dev);
4406 unsigned long flags;
4408 if (debug_level >= DEBUG_LEVEL_INFO)
4409 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
4412 stats->tx_aborted_errors++;
4414 spin_lock_irqsave(&info->lock,flags);
4416 spin_unlock_irqrestore(&info->lock,flags);
4418 netif_wake_queue(dev);
4422 * called by device driver when transmit completes
4423 * reenable network layer transmit if stopped
4425 * info pointer to device instance information
4427 static void hdlcdev_tx_done(MGSLPC_INFO *info)
4429 if (netif_queue_stopped(info->netdev))
4430 netif_wake_queue(info->netdev);
4434 * called by device driver when frame received
4435 * pass frame to network layer
4437 * info pointer to device instance information
4438 * buf pointer to buffer contianing frame data
4439 * size count of data bytes in buf
4441 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
4443 struct sk_buff *skb = dev_alloc_skb(size);
4444 struct net_device *dev = info->netdev;
4445 struct net_device_stats *stats = hdlc_stats(dev);
4447 if (debug_level >= DEBUG_LEVEL_INFO)
4448 printk("hdlcdev_rx(%s)\n",dev->name);
4451 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
4452 stats->rx_dropped++;
4456 memcpy(skb_put(skb, size),buf,size);
4458 skb->protocol = hdlc_type_trans(skb, info->netdev);
4460 stats->rx_packets++;
4461 stats->rx_bytes += size;
4465 info->netdev->last_rx = jiffies;
4469 * called by device driver when adding device instance
4470 * do generic HDLC initialization
4472 * info pointer to device instance information
4474 * returns 0 if success, otherwise error code
4476 static int hdlcdev_init(MGSLPC_INFO *info)
4479 struct net_device *dev;
4482 /* allocate and initialize network and HDLC layer objects */
4484 if (!(dev = alloc_hdlcdev(info))) {
4485 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
4489 /* for network layer reporting purposes only */
4490 dev->base_addr = info->io_base;
4491 dev->irq = info->irq_level;
4493 /* network layer callbacks and settings */
4494 dev->do_ioctl = hdlcdev_ioctl;
4495 dev->open = hdlcdev_open;
4496 dev->stop = hdlcdev_close;
4497 dev->tx_timeout = hdlcdev_tx_timeout;
4498 dev->watchdog_timeo = 10*HZ;
4499 dev->tx_queue_len = 50;
4501 /* generic HDLC layer callbacks and settings */
4502 hdlc = dev_to_hdlc(dev);
4503 hdlc->attach = hdlcdev_attach;
4504 hdlc->xmit = hdlcdev_xmit;
4506 /* register objects with HDLC layer */
4507 if ((rc = register_hdlc_device(dev))) {
4508 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
4518 * called by device driver when removing device instance
4519 * do generic HDLC cleanup
4521 * info pointer to device instance information
4523 static void hdlcdev_exit(MGSLPC_INFO *info)
4525 unregister_hdlc_device(info->netdev);
4526 free_netdev(info->netdev);
4527 info->netdev = NULL;
4530 #endif /* CONFIG_HDLC */